Gardening Terms

A small, dry one-seeded indehiscent fruit that does not open at maturity to release the seed. Learn more.

Needle-shaped, e.g. a leaf form. Learn more.

Soil with a pH below 7, often requiring lime to raise its pH for most crops. Learn more.

For a flower having radial symmetry, divisible into identical halves along two or more planes. Learn more.

The upper surface of a leaf. Learn more.

a family of aphid-like insects that feed exclusively on conifers and typically are covered with white waxy material. Learn more.

A root that develops from non-root tissue, such as stems or leaves. Learn more.

Loosening soil or compost to improve oxygen availability for roots and microbes. Learn more.

A method of growing plants in air or mist environments without the use of soil. Learn more.

has to do with appearance or beauty. Learn more.

The ability of soil aggregates to resist disintegration from water or mechanical disturbance, influencing erosion and infiltration. Learn more.

The study and application of ecological principles to agricultural systems to promote sustainability and biodiversity. Learn more.

An ecosystem managed by humans for agricultural production while maintaining ecological processes and biodiversity. Learn more.

A land management system combining trees or shrubs with crops or livestock to enhance productivity and biodiversity. Learn more.

A propagation method where roots are induced to form on a stem while still attached to the parent plant. Learn more.

having a basic reaction containing hydroxide ions (OH−) and turning red litmus blue when in solution. Learn more.

Soil with a pH above 7, often found in arid regions with low rainfall. Learn more.

One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome. Learn more.

Differences in the DNA sequence of alleles at the same gene locus, contributing to genetic diversity. Learn more.

Chemical inhibition of one plant by another through compounds released into the environment. Learn more.

Species occurring in separate, non-overlapping geographical regions. Learn more.

A fungal disease caused by Alternaria species, leading to circular dark lesions with concentric rings on leaves. Learn more.

an arrangement of leaves or other parts not opposite or whorled; parts situated one at a node, as leaves on a stem. Learn more.

one of two kinds of plants on which a parasitic insect or fungus (such as rust) must develop to complete its life cycle. Learn more.

Any material added to soil to improve its physical or chemical properties. Learn more.

Also known as “flowering plants,” they are the largest and most diverse group of plants on Earth and are distinguished by their flowers and the production of seeds protected by a fruit Learn more.

The total amount of negatively charged ions a soil can adsorb, important for nutrient retention and availability. Learn more.

A plant that completes its life cycle—from germination to seed production—within one growing season. Learn more.

A garden bed replanted each year with new annuals for continuous seasonal color. Learn more.

The study of the relationships between flowers and pollinators. Learn more.

The pollen-producing part of a stamen. Learn more.

the pollen-bearing part of a stamen, borne at the top of a filament or sessile. Learn more.

A class of pigments responsible for red, purple, and blue colors in plants. Learn more.

A group of fungal diseases causing dark, sunken lesions on leaves, stems, or fruit. Learn more.

Originating in human activity, often used regarding environmental effects. Learn more.

Flowers having no petals. Learn more.

Acronym for the Angiosperm Phylogeny Group, an organization that establishes modern plant classification systems. Learn more.

Small, soft-bodied insects that suck sap from plants, often causing curling leaves and transmitting viruses. Learn more.

A region of actively dividing cells at the tips of roots and shoots responsible for primary growth. Learn more.

subordinate or derivative body parts such as leaves, petals, or stems. Learn more.

A fungal disease of apples and pears that causes dark, scabby lesions on leaves and fruit. Learn more.

A system combining aquaculture with hydroponics where fish waste provides nutrients for plants. Learn more.

A garden structure that supports climbing plants and often provides shade or a passageway. Learn more.

A professional specializing in the care and management of trees. Learn more.

Gardening practices adapted to dry climates emphasizing water conservation. Learn more.

Caterpillars that feed in large groups on grasses and crops, capable of rapid defoliation. Learn more.

caterpillar species closely related to cutworms that often move in masses through crop stands while stripping foliage. Learn more.

A phytoplasma disease causing chlorosis and deformed flowers in many ornamentals and vegetables. Learn more.

ear-shaped lobes, usually describing the base of leaves or petals. Learn more.

The person credited with publishing the first valid description and name for a plant. Learn more.

An automatically generated infraspecific or infrageneric name. Learn more.

A stiff bristle appendage. Learn more.

The angle between a leaf or branch and the stem from which it grows. Learn more.

A bud that forms in the axil of a leaf and may develop into a branch or flower. Learn more.

the angle between a leaf or branch and the stem from which it grows. Learn more.

A line of symmetry or the principal column of a plant or inflorescence. Learn more.

unicellular microscopic organisms that lack chlorophyll and multiply by fission. Learn more.

relating to or caused by bacteria. Learn more.

A general term for diseases caused by pathogenic bacteria that lead to leaf spots, wilting, or dieback. Learn more.

A bacterial disease that causes watery decay in vegetables and tubers, common in wet or humid conditions. Learn more.

Bacterial infections that cause leaf spots and fruit blemishes on stone fruit and peppers. Learn more.

A bacterial infection that clogs plant vascular tissue, causing sudden wilting. Learn more.

a single-celled microscopic organism that lacks chlorophyll and multiplies by fission. Learn more.

Moth larvae that construct protective cases from silk and plant material and feed on foliage. Learn more.

A plant sold with its roots free of soil, typically dormant and suitable for transplanting. Learn more.

pertaining to the base or point of attachment of an organ, such as leaves at the base of a plant. Learn more.

A circular arrangement of leaves at the base of a plant, common in biennials like carrots and dandelions. Learn more.

The proportion of a soil’s cation exchange sites occupied by basic cations (Ca²⁺, Mg²⁺, K⁺, Na⁺), used to assess fertility. Learn more.

The first validly published name given to a genus or species, forming the base for later names. Learn more.

The person or persons who first validly published a species name. Learn more.

A viral disease producing mottled, distorted leaves and reduced yields in legumes. Learn more.

A flower having the shape of a bell. Learn more.

An insect that preys on pests or pollinates crops, aiding in pest control and reproduction. Learn more.

A fleshy fruit that is indehiscent with seeds dispersed through the pulp. Learn more.

A plant that completes its life cycle over two growing seasons, flowering and setting seed in the second. Learn more.

Charred organic matter added to soil to improve fertility, structure, and carbon sequestration. Learn more.

Capable of being decomposed by bacteria or other natural organisms, reducing environmental impact. Learn more.

Mulch materials that break down naturally into the soil over time. Learn more.

The variety of living organisms in an ecosystem, essential for ecological stability and resilience. Learn more.

A holistic agricultural system combining organic methods with lunar and cosmic cycles to enhance soil and crop vitality. Learn more.

The movement of elements such as carbon, nitrogen, and phosphorus through biological, geological, and chemical processes. Learn more.

The use of living organisms such as predators or pathogens to control pest populations. Learn more.

A compound leaf in which each leaflet is further divided into smaller leaflets. Learn more.

Mesh material used to prevent birds from damaging plants or eating fruits. Learn more.

A common fungal disease on roses producing circular black lesions on leaves. Learn more.

The broad, flat part of a leaf. Learn more.

Excluding light from plant parts to keep them pale and tender. Learn more.

Rapid browning and death of plant tissue caused by fungi, bacteria, or environmental stress. Learn more.

A physiological disorder caused by calcium imbalance, resulting in dark, sunken lesions on the blossom end of fruits. Learn more.

An anaerobic fermentation process to pre-digest kitchen scraps before soil incorporation. Learn more.

Premature flowering and seed production, often triggered by heat or day length. Learn more.

The Japanese art of growing miniature trees in containers through pruning and training. Learn more.

A garden dedicated to the collection, cultivation, and display of a wide range of plants labeled with their botanical names. Learn more.

The art and science of depicting plants with accurate botanical detail for identification and study. Learn more.

The scientific name of a plant using binomial nomenclature. Learn more.

The scientific study of plants, their structure, growth, reproduction, and ecology. Learn more.

A fungal disease that infects flowers, leaves, and fruit under cool, damp conditions. Learn more.

A serious disease of boxwood caused by Calonectria species, leading to leaf spots, defoliation, and stem lesions. Learn more.

A modified or specialized leaf often associated with a reproductive structure such as a flower or inflorescence. Learn more.

A small bract borne on a flower stalk. Learn more.

a reduced leaf often scale-like and usually associated with a flower or inflorescence. Learn more.

A hand tool with long tines used to aerate and loosen soil with minimal disturbance. Learn more.

A turfgrass disease caused by Rhizoctonia solani leading to circular patches of brown turf. Learn more.

An undeveloped shoot containing a potential leaf, flower, or branch. Learn more.

The graft junction where scion and rootstock are joined. Learn more.

A vegetated area next to a water body that helps filter runoff and protect water quality. Learn more.

An underground storage organ composed of a short stem and fleshy scales. Learn more.

A coarse woven fabric used for root balls, winter protection, and erosion control. Learn more.

A green caterpillar pest of cruciferous crops, named for its looping movement. Learn more.

A hardened soil layer cemented by calcium carbonate that impedes drainage and root growth. Learn more.

a mass of thin-walled cells, usually formed as a result of wounding or infection. Learn more.

Wound tissue that forms over cuts and can develop roots or shoots in propagation. Learn more.

an herb with spiny pods, for example puncturevine. Learn more.

the outer whorl of flower parts, usually green, that encloses the petals and other floral parts when in bud. Learn more.

The layer of meristematic tissue between the xylem and phloem where secondary growth occurs. Learn more.

The layer of actively dividing cells between the xylem and phloem that enables secondary growth in plants. Learn more.

A long, slender woody stem typical of roses, raspberries, and some shrubs. Learn more.

long, woody, and flexible stems rising from the ground, typical of brambles and roses. Learn more.

Localized areas of dead tissue on stems or branches, often caused by fungal or bacterial infection. Learn more.

A dry fruit that splits open to release its seeds when mature. Learn more.

The biogeochemical cycle through which carbon moves among the atmosphere, oceans, soil, and living organisms. Learn more.

The total greenhouse gas emissions caused directly or indirectly by an individual, organization, or activity. Learn more.

The long-term storage of carbon dioxide in vegetation, soils, or the ocean to mitigate climate change. Learn more.

The basic female reproductive unit of a flower, consisting of ovary, style, and stigma. Learn more.

A root-feeding fly whose larvae tunnel into carrots, parsnips, and related crops. Learn more.

The maximum population size of a species that an environment can sustain indefinitely. Learn more.

the outer layer of an exoskeleton shed by an insect or mite and often seen on leaves or twigs. Learn more.

fecal material; caterpillar pellets. Learn more.

The larval stage of moths and butterflies, many species being major plant defoliators. Learn more.

A positively charged ion, such as potassium (K⁺) or calcium (Ca²⁺), essential for plant nutrition and soil chemistry. Learn more.

A measure of soil’s ability to hold and exchange positively charged nutrient ions. Learn more.

A slim, cylindrical flower cluster, usually wind-pollinated and lacking petals. Learn more.

A rust disease requiring juniper and apple hosts, producing galls on juniper and spots on apple leaves. Learn more.

Accumulated hours of cold required by some plants to break dormancy and flower properly. Learn more.

The green photosynthetic pigment essential for capturing light energy. Learn more.

The plant cell organelle where photosynthesis occurs. Learn more.

Yellowing of leaves due to insufficient chlorophyll, often from nutrient deficiency or poor conditions. Learn more.

showing chlorosis; having pale or yellowed leaves due to lack of chlorophyll. Learn more.

A flattened stem resembling and functioning as a leaf. Learn more.

The study of clay minerals and their structure, affecting soil texture, nutrient exchange, and water retention. Learn more.

Soil with a high proportion of fine particles that holds water and nutrients but drains slowly. Learn more.

A form of self-pollination where flowers do not open, ensuring seed set in adverse conditions. Learn more.

The regulation of temperature, humidity, and light in greenhouse environments to optimize plant growth. Learn more.

A small, transparent cover placed over plants to protect them from cold and pests. Learn more.

Genetically identical individuals derived from a single ancestor by asexual reproduction. Learn more.

A self-sustaining system in which waste is reused or recycled to minimize resource loss. Learn more.

A soilborne disease of brassicas causing swollen, distorted roots and stunted plants. Learn more.

a protective covering, often of silk, spun by many larvae during the pupal stage. Learn more.

A low, unheated enclosure that protects plants and extends the growing season. Learn more.

A pre-germination treatment that exposes seeds to a cold, moist period to break dormancy. Learn more.

Brassica vegetables like cabbage, broccoli, and kale grown for edible leaves or buds. Learn more.

Placing certain plants together to enhance growth, deter pests, or improve yield. Learn more.

Decomposed organic matter added to soil to improve structure and fertility. Learn more.

A container used to hold and manage organic waste during the composting process. Learn more.

A liquid extract made by steeping compost to apply as a soil drench or foliar spray. Learn more.

The controlled decomposition of organic matter into nutrient-rich soil amendment called compost. Learn more.

A leaf composed of multiple leaflets attached to a single petiole. Learn more.

The reproductive structure of conifers containing seeds or pollen. Learn more.

Describes structures, such as petals or leaves, that are fused to each other. Learn more.

A landscaping technique aligning planting beds along land contours to reduce erosion. Learn more.

Cutting trees or shrubs back to ground level to promote new shoots from the base. Learn more.

A swollen underground stem that stores nutrients and produces new growth. Learn more.

A moth larva that feeds on corn ears and other crops, causing direct kernel damage. Learn more.

The collective term for the petals of a flower. Learn more.

A layer of tissue between the epidermis and vascular tissue, involved in storage and transport of nutrients. Learn more.

A flat-topped or slightly convex inflorescence in which lower flower stalks are longer than upper ones. Learn more.

The embryonic leaf in seed-bearing plants that often emerges first during germination. Learn more.

A crop grown primarily to protect and enrich the soil rather than for harvest. Learn more.

the mobile first-stage nymphs of certain scale insects or adelgids. Learn more.

With rounded or scalloped teeth along the margin. Learn more.

The practice of alternating the types of crops grown in a specific area to maintain soil fertility and reduce pests. Learn more.

The transfer of pollen between flowers of different plants, promoting genetic diversity and hybrid vigor. Learn more.

The mating of plants from different varieties or species to combine desirable traits. Learn more.

The region where the stem and root systems meet, often near the soil surface. Learn more.

The region where a plant’s stem meets the roots, often at soil level. Learn more.

A bacterial disease that produces tumor-like swellings on roots and stems. Learn more.

Fungal or bacterial decay of the crown area at the base of the plant, often leading to wilting and death. Learn more.

A small beetle that damages cucurbits by feeding on leaves and transmitting bacterial wilt. Learn more.

A foliar disease of cucumbers and melons caused by Pseudoperonospora cubensis, producing yellow spots and mold. Learn more.

A cultivated variety selected for distinct, heritable traits maintained by propagation. Learn more.

a plant variety that has been produced through cultivation by selective breeding. Learn more.

plants or soil maintained or prepared by humans for growing crops or ornamentals. Learn more.

Pest management via horticultural practices such as crop rotation or sanitation. Learn more.

A viral disease transmitted by leafhoppers that causes leaf curling and stunted growth. Learn more.

A waxy protective film covering the epidermis of leaves and stems. Learn more.

A piece of plant material used to reproduce a new plant vegetatively. Learn more.

Nocturnal caterpillars that sever seedlings at soil level during feeding. Learn more.

larvae of certain noctuid moths that cut down young seedlings near soil level. Learn more.

An inflorescence where the central flower opens first, followed by side flowers. Learn more.

A fungal disease of woody plants leading to sunken cankers and branch dieback. Learn more.

A fungal or oomycete disease causing seedlings to collapse near the soil line, often from Pythium or Rhizoctonia. Learn more.

Removing spent flowers to encourage further bloom or maintain appearance. Learn more.

A plant that seasonally sheds its leaves, typically in autumn. Learn more.

A forest dominated by trees that shed leaves seasonally. Learn more.

Irrigation that penetrates the root zone, encouraging deeper root systems. Learn more.

The loss or removal of leaves from a plant, caused by pests, disease, or weather. Learn more.

A fruit or organ that splits open when ripe to release its contents, such as seeds or spores. Learn more.

the period when buds begin to swell but before new growth starts. Learn more.

A microbial process that converts nitrates (NO₃⁻) into nitrogen gas (N₂), resulting in nitrogen loss from soil. Learn more.

With a toothed margin; having pointed teeth along the edge. Learn more.

the drying out or loss of moisture from plant tissue. Learn more.

Growth habits describing whether a plant stops at a set size or continues to grow and flower. Learn more.

The temperature at which air becomes saturated and water vapor condenses into dew. Learn more.

A flowering plant with two cotyledons in its seed; now part of the eudicots. Learn more.

progressive death of shoots or branches starting at the tips. Learn more.

having male and female reproductive organs on separate plants. Learn more.

A small tubular flower located in the center of composite flower heads, such as in sunflowers. Learn more.

Arranged in two opposite vertical rows on either side of an axis. Learn more.

having a shape or form that is twisted or unnatural. Learn more.

A propagation method that separates a mature plant into sections each with roots and shoots. Learn more.

A period of minimal growth and metabolic activity allowing plants to survive unfavorable conditions. Learn more.

A group of plant diseases producing yellow leaf spots and fuzzy gray growth on the undersides; caused by oomycetes. Learn more.

The movement of water through soil; essential for preventing waterlogging and root diseases. Learn more.

A water-efficient irrigation method that delivers water directly to plant roots through tubing and emitters. Learn more.

The outermost circumference of a tree’s canopy where water drips from the leaves to the ground. Learn more.

a prolonged period of deficient rainfall that reduces soil moisture and plant growth. Learn more.

The ability of a plant to maintain function under limited water availability. Learn more.

A fleshy fruit with a single hard stone enclosing the seed, such as a cherry or peach. Learn more.

A vascular wilt disease of elms spread by bark beetles and caused by Ophiostoma fungi. Learn more.

A fungal disease caused by Alternaria species, producing concentric ring lesions on leaves and stems. Learn more.

Nutrient-rich material produced by earthworms that enhances soil structure and fertility. Learn more.

Nocturnal insects that feed on decaying material and occasionally damage flowers and seedlings. Learn more.

A measure of the environmental impact of human activities expressed in terms of land and resource use. Learn more.

The ability of an ecosystem to recover from disturbances while maintaining its functions and structure. Learn more.

The process of assisting the recovery of degraded ecosystems through active management and replanting. Learn more.

The benefits humans derive from natural ecosystems, such as pollination, nutrient cycling, and water purification. Learn more.

A transition area between two biological communities, where species from both ecosystems may coexist. Learn more.

The study of how soils influence living things, particularly plants and agriculture. Learn more.

Creating defined boundaries between lawn, beds, or paths for aesthetics and maintenance. Learn more.

The integration of food-producing plants into ornamental garden designs for both beauty and function. Learn more.

a biochemical test that uses enzyme-linked antibodies to detect pathogens. Learn more.

The process by which dissolved or suspended materials are removed from one soil horizon to another below. Learn more.

The young plant contained within a seed. Learn more.

Restricted to or native to a particular geographic area. Learn more.

The innermost layer of the cortex in plant roots that regulates water and nutrient flow into the vascular cylinder. Learn more.

an organism, often a fungus or bacterium, that lives inside a plant without causing harm. Learn more.

Nutritive tissue within seeds that surrounds and nourishes the embryo. Learn more.

Having a smooth margin without teeth or lobes. Learn more.

A plant with a very short life cycle, often germinating, flowering, and dying within a few weeks. Learn more.

The outer layer of the pericarp or fruit wall. Learn more.

The portion of the embryo or seedling above the cotyledons. Learn more.

The outermost layer of cells covering leaves, stems, and roots, serving as a protective barrier. Learn more.

A plant that grows on another plant for physical support but is not parasitic. Learn more.

to completely remove or destroy a pest, weed, or disease organism. Learn more.

tiny plant-feeding mites with only four legs, often host-specific and causing galls or leaf distortion. Learn more.

The process by which soil and rock are removed from the Earth’s surface by wind, water, or human activity. Learn more.

Practices to prevent soil loss from wind or water movement. Learn more.

Training a plant to grow flat against a support in formal patterns. Learn more.

Weak, elongated growth due to insufficient light. Learn more.

A cooling method using water evaporation to reduce air temperature inside a greenhouse. Learn more.

Combined water loss from soil evaporation and plant transpiration. Learn more.

A plant that retains functional leaves throughout the year. Learn more.

waste products eliminated by an insect, mainly undigested food or feces. Learn more.

Having a main trunk or stem that grows more strongly than the side branches, forming a conical shape. Learn more.

The outer layer of the wall of a pollen grain or spore. Learn more.

The outermost layer of the pericarp, or fruit wall. Learn more.

Describing a plant species introduced from another region or country. Learn more.

Projecting beyond surrounding parts, such as stamens extending beyond petals. Learn more.

A cluster or bundle of structures, such as needles or roots. Learn more.

Grouped or growing in bundles or clusters. Learn more.

Vascular plants that reproduce via spores and lack seeds or flowers. Learn more.

Capable of producing viable seeds, spores, or reproductive structures. Learn more.

Substances applied to supply essential nutrients for plant growth. Learn more.

A root system made up of many thin, moderately branching roots growing from the stem base. Learn more.

The amount of soil moisture remaining after excess water has drained away. Learn more.

The slender stalk of a stamen that supports the anther. Learn more.

A bacterial disease of apples, pears, and related plants that blackens blossoms and shoots. Learn more.

Small, jumping beetles that chew small round holes in leaves of many vegetable crops. Learn more.

A graphical representation showing the arrangement of floral parts. Learn more.

A symbolic representation of the structure of a flower using letters, numbers, and symbols. Learn more.

The study of the structure and form of flowers and their reproductive organs. Learn more.

A small flower that is part of a larger inflorescence, as in grasses or daisies. Learn more.

The branch of horticulture concerned with the cultivation of flowering and ornamental plants. Learn more.

The reproductive structure in angiosperms that produces seeds. Learn more.

The collective leaves of a plant. Learn more.

Applying nutrients to plant leaves in solution for absorption through foliage. Learn more.

A dry, single-carpel fruit that splits along one seam to release its seeds. Learn more.

A complex network of interconnected food chains representing feeding relationships in an ecosystem. Learn more.

Inducing plants to grow or flower out of their natural season with environmental controls. Learn more.

A sustainable, multi-layered food production system modeled after a natural forest ecosystem. Learn more.

A gravel-filled trench with perforated pipe to redirect surface and groundwater. Learn more.

The large, divided leaf of a fern or palm. Learn more.

The average date of the last spring or first autumn frost in a region. Learn more.

Tissue damage in plants resulting from freezing temperatures that rupture cell walls. Learn more.

The mature ovary of a flowering plant, often containing seeds. Learn more.

Small flies whose larvae feed within fruit; includes agricultural pests such as Drosophila and Ceratitis. Learn more.

Application of gaseous pesticides to control soilborne or stored-product pests. Learn more.

Generic term for necrotic lesions on leaves caused by fungal pathogens. Learn more.

A chemical or biological agent used to prevent or control fungal diseases. Learn more.

Tiny flies whose larvae feed on organic matter and roots in moist potting soil. Learn more.

Soilborne fungal disease causing yellowing and vascular browning in many crops. Learn more.

Abnormal plant growths caused by insects, mites, fungi, or bacteria that result in swelling or distortion of tissues. Learn more.

Microscopic mites that induce gall formation on leaves or buds of plants. Learn more.

Tiny wasps that lay eggs in plant tissues, producing characteristic galls, especially on oaks. Learn more.

The haploid phase in a plant’s life cycle that produces gametes. Learn more.

The art and process of creating functional and aesthetic outdoor planting spaces. Learn more.

A record kept by gardeners documenting planting dates, conditions, and observations. Learn more.

The genetic makeup of an organism that determines its hereditary potential and characteristics. Learn more.

A permeable fabric used in landscaping to separate soil layers and prevent weed growth. Learn more.

The process by which a seed begins growth into a seedling under suitable conditions. Learn more.

The percentage of seeds that successfully sprout under specific conditions, used as a measure of seed viability. Learn more.

A class of plant hormones that stimulate stem elongation, germination, and flowering. Learn more.

Damage that removes bark around the circumference of a stem, interrupting nutrient flow and often killing the plant. Learn more.

A root that encircles the trunk or other roots, restricting growth and transport. Learn more.

Smooth and hairless. Learn more.

Describing a bluish-green or gray waxy coating on leaves or stems. Learn more.

Joining plant tissues from two plants so they grow as one. Learn more.

A sharp tool designed for making clean cuts during grafting procedures. Learn more.

Chewing insects that feed on leaves and stems, occasionally causing severe defoliation. Learn more.

Crops grown specifically to be incorporated into the soil to add organic matter and nutrients. Learn more.

A vegetated roof system that improves insulation, absorbs rainwater, and supports urban biodiversity. Learn more.

Common name for green-colored aphids that infest soft shoots and transmit viruses. Learn more.

A structure with transparent walls and roof for controlled plant cultivation. Learn more.

Another term for Botrytis cinerea, a fungal disease producing fuzzy gray growth on decaying tissues. Learn more.

Wastewater from sinks or showers that can be reused for irrigation after treatment. Learn more.

The reuse of lightly used household water (from sinks, showers, etc.) for irrigation or flushing. Learn more.

Low-growing plants used to cover soil for aesthetics and erosion control. Learn more.

Water located beneath the Earth’s surface in soil pore spaces and rock formations. Learn more.

An artificial light source used to support photosynthesis indoors. Learn more.

A fungal disease of guava trees caused by Fusarium oxysporum, leading to yellowing and wilting. Learn more.

Exudation of sticky sap or gum from bark, often caused by fungal infection or mechanical injury. Learn more.

The collective term for all carpels or female reproductive organs in a flower. Learn more.

A defoliating moth (Lymantria dispar) whose caterpillars feed on the foliage of many tree species. Learn more.

The natural environment in which a plant species lives and grows. Learn more.

The process by which large habitats are broken into smaller, isolated patches, often due to human activity. Learn more.

The process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed. Learn more.

A plant adapted to grow in saline conditions such as salt marshes. Learn more.

Gradually acclimating seedlings to outdoor conditions before transplanting. Learn more.

A geographic zone defined by minimum temperatures to guide plant selection. Learn more.

A dense, compacted subsurface soil layer that impedes water and roots. Learn more.

Non-plant elements of landscape design such as paths, walls, and patios. Learn more.

A pruning cut that removes part of a shoot to stimulate branching below. Learn more.

An electric mat used to gently warm soil or trays to improve seed germination and root growth. Learn more.

A cultivar maintained through open pollination over generations, often valued for heritage traits. Learn more.

A traditional seed variety passed down through generations, often open-pollinated and non-hybridized. Learn more.

A non-woody plant that dies back to the ground after flowering. Learn more.

Non-woody plants that die back to the ground each year. Learn more.

A collection of preserved plant specimens used for scientific study. Learn more.

A plant or flower possessing both male (stamens) and female (carpels) reproductive organs. Learn more.

The improved or increased function of hybrid offspring compared to parents, often seen in growth or yield. Learn more.

The scar or mark on a seed where it was attached to the ovary wall or funiculus. Learn more.

Covered with coarse, stiff hairs. Learn more.

A stem that is tubular inside, lacking solid tissue in the center. Learn more.

Structures sharing a common evolutionary origin, even if functionally different. Learn more.

a sugary liquid secreted by sap-sucking insects such as aphids or scales. Learn more.

the caterpillar stage of the hawk or sphinx moth, recognizable by a horn-like projection on its tail end. Learn more.

The use of gardening and plant-related activities for therapeutic purposes. Learn more.

A raised bed technique built over woody debris to enhance moisture retention and fertility. Learn more.

A clear plastic cover placed over seed trays to maintain high humidity for germination. Learn more.

Stable, decomposed organic material that contributes to soil structure and fertility. Learn more.

Progeny from crossing different varieties or species, often denoted as F1 in cultivation. Learn more.

The process of crossing different species or varieties to produce hybrid offspring with specific traits. Learn more.

A method of growing plants in nutrient-rich water without the use of soil. Learn more.

An instrument used to measure relative humidity, useful in greenhouses. Learn more.

Describing materials that absorb moisture from the air. Learn more.

A floral structure formed by the fusion of the basal parts of the calyx, corolla, and stamens. Learn more.

The stem portion of a germinating seedling below the cotyledons and above the root. Learn more.

The accumulation of leached materials such as clay, iron, or organic matter into a lower soil horizon. Learn more.

Overlapping in arrangement, like roof shingles or scales. Learn more.

the larval or nymphal stages of insects before they reach adulthood. Learn more.

A fruit that does not open at maturity to release its seeds. Learn more.

Growth that is not genetically limited, continuing throughout the life of the plant. Learn more.

Native or naturally occurring in a particular region. Learn more.

the invasion and multiplication of a pathogen inside host tissue. Learn more.

The arrangement or cluster of flowers on a stem. Learn more.

Plant swelling or deformation caused by insect activity such as egg laying or feeding, often species-specific. Learn more.

A habitat or structure designed to attract and support beneficial insects. Learn more.

A mild pesticide made from potassium salts of fatty acids, used to control soft-bodied pests like aphids and mites. Learn more.

A system that combines crop and livestock production to maximize efficiency and reduce waste. Learn more.

The balanced use of organic and inorganic fertilizers to sustain soil fertility and productivity. Learn more.

A sustainable pest control strategy combining biological, cultural, mechanical, and chemical methods. Learn more.

The stem segment between two nodes where leaves and buds arise. Learn more.

Referring to non-native plants that spread aggressively in a new environment. Learn more.

Non-native organisms that spread rapidly and harm ecosystems or economies. Learn more.

A whorl of bracts beneath a flower cluster. Learn more.

Yellowing of leaves due to iron deficiency, common in alkaline soils. Learn more.

The artificial application of water to land to assist plant growth. Learn more.

An invasive scarab beetle that feeds on foliage, flowers, and fruit. Learn more.

A compressed peat or coir plug that expands with water for seed starting. Learn more.

A ridgelike structure along the lower petals of certain flowers, such as legumes. Learn more.

A raised bed with a central compost basket for watering and nutrient cycling. Learn more.

A formal garden of intricately interlaced hedges and paths. Learn more.

A Japanese technique of growing plants in a moss-covered soil ball. Learn more.

A predatory beetle commonly used in biological control of soft-bodied pests. Learn more.

Shaped like a lance; longer than wide and tapering toward the tip. Learn more.

the immature, feeding stage of an insect that undergoes complete metamorphosis. Learn more.

plural of larva; immature insects undergoing complete metamorphosis. Learn more.

relating to the larva stage of an insect. Learn more.

A devastating disease caused by Phytophthora infestans, leading to dark lesions and rapid plant collapse. Learn more.

A milky or colored fluid produced by specialized plant cells. Learn more.

A device used to perforate the soil with small holes to allow air, water, and nutrients to reach roots. Learn more.

A propagation method where a stem forms roots while still attached to the parent plant. Learn more.

Liquid that drains through soil or compost, carrying dissolved materials, nutrients, or pollutants. Learn more.

The loss of soluble nutrients from soil as water percolates downward. Learn more.

The upper layer of soil where minerals and nutrients are dissolved and carried downward by water. Learn more.

The main organ of photosynthesis in most plants, typically flat and green. Learn more.

Rapid browning and death of leaf tissue caused by fungi, bacteria, or environmental stress. Learn more.

The larva of various insects that tunnels between leaf layers, creating visible trails. Learn more.

A fungal disease or composted leaf product; in tomatoes, it refers to Passalora fulva infection. Learn more.

Decomposed leaves used as a soil conditioner and mulch. Learn more.

Viral diseases of crops like potatoes and grapes that cause upward leaf curling and yield loss. Learn more.

Necrosis of leaf edges due to water stress, sunburn, or bacterial infection. Learn more.

Circular necrotic lesions on leaves caused by fungi or bacteria, often surrounded by yellow halos. Learn more.

a small leaflike part of a compound leaf. Learn more.

insect larvae that live between leaf surfaces, feeding on internal tissues and creating tunnels or blotches. Learn more.

Describing spindly, elongated growth usually due to inadequate light. Learn more.

A pod-type fruit characteristic of the pea family that splits open along two seams. Learn more.

The lower of two bracts enclosing the flower of a grass floret. Learn more.

A small pore on stems or fruit that allows gas exchange. Learn more.

A long-stemmed, woody vine that climbs other plants to reach sunlight. Learn more.

The amount of light energy received per unit area, influencing photosynthesis and plant growth rate. Learn more.

An organic polymer in cell walls that provides rigidity and resistance to decay. Learn more.

a thin outgrowth at the junction of a leaf and leaf sheath, common in grasses. Learn more.

Calcium-containing materials applied to raise soil pH and reduce acidity. Learn more.

A low-growing ground cover planted under crops to suppress weeds and retain moisture. Learn more.

A soil with a balanced mixture of sand, silt, and clay, prized for gardening. Learn more.

A rounded or pointed projection, often one of several divisions on a leaf or petal. Learn more.

rounded or pointed divisions of an organ such as a leaf or petal. Learn more.

A small cavity or compartment within an organ, such as the chambers of an ovary or anther. Learn more.

Small scale-like organs at the base of the ovary in grass flowers that aid in flower opening. Learn more.

a caterpillar that moves in looping motions due to missing middle legs, such as inchworms. Learn more.

A long-handled pruning tool used to cut thicker stems and small branches. Learn more.

A group of plant bugs (Lygus spp.) that feed on developing buds and fruit, causing deformation. Learn more.

Essential elements required in larger amounts, typically N, P, K, Ca, Mg, and S. Learn more.

the legless larval stage of a fly (order Diptera). Learn more.

A nutrient deficiency causing yellowing between leaf veins, common in tomatoes and citrus. Learn more.

Small, white, cottony insects that suck sap from stems and leaves, often secreting honeydew. Learn more.

having a thin, parchment-like texture; often describing plant or insect tissue. Learn more.

The middle layer of the fruit wall, typically the fleshy part of a fruit. Learn more.

A localized climate that differs from the surrounding area, influenced by vegetation, terrain, or structures. Learn more.

Essential elements required in trace amounts such as Fe, Mn, Zn, Cu, B, Mo, and Cl. Learn more.

The smaller of two kinds of spores produced by seed plants, developing into male gametophytes. Learn more.

a small fly from several families, some of which feed on plants. Learn more.

The central vein of a leaf or leaflet. Learn more.

the central vein of a leaf that supports and transports water and nutrients. Learn more.

A common fungal disease characterized by white or gray powdery growth on leaf surfaces. Learn more.

A soil conservation practice that reduces plowing to preserve structure and microbial life. Learn more.

Tiny arachnids that may feed on plant sap, causing stippling and discoloration. Learn more.

The practice of growing two or more crops simultaneously in the same field for better resource use. Learn more.

A broad term for various filamentous fungi that decompose organic matter, sometimes pathogenic to plants. Learn more.

Flowering and fruiting once before dying, as in agave and bamboo. Learn more.

A flowering plant with one cotyledon in the seed, such as grasses and lilies. Learn more.

The agricultural practice of growing a single crop species in a field over a large area, often reducing biodiversity. Learn more.

Having both male and female flowers on the same plant. Learn more.

A viral disease of tobacco and related plants that causes mottled leaves and stunted growth. Learn more.

A group of plant viruses producing mottled green and yellow leaf patterns. Learn more.

A group of viruses causing mottled leaf patterns and stunted growth. Learn more.

The larval stage of moths that may feed on leaves, buds, or fruit depending on species. Learn more.

A gelatinous substance produced by some plants that aids in water retention or seed germination. Learn more.

Material applied to the soil surface to conserve moisture, suppress weeds, and moderate temperature. Learn more.

An improper mulching technique in which mulch is piled high against a tree trunk, potentially causing decay. Learn more.

The use of organic or inorganic material spread over soil to retain moisture, suppress weeds, and regulate temperature. Learn more.

A fruit formed from the ovaries of several flowers growing in a cluster, such as a pineapple. Learn more.

A fungal infection that desiccates and hardens infected fruits, often overwintering as ‘mummies.’ Learn more.

A change in the DNA sequence that can lead to genetic variation and potentially new traits. Learn more.

A symbiotic relationship in which both organisms benefit, such as pollinators and flowers. Learn more.

masses of hyphae forming the vegetative body of a fungus. Learn more.

The vegetative network of fungal filaments (hyphae) that spread through soil or tissue. Learn more.

A mutualistic association between plant roots and fungi that enhances nutrient uptake. Learn more.

A disruption in the symbiotic relationship between roots and beneficial fungi, often caused by soil disturbance or chemical fertilizers. Learn more.

Shorthand for the primary plant nutrients nitrogen, phosphorus, and potassium in fertilizers. Learn more.

originating naturally in a given region or ecosystem. Learn more.

A species that occurs naturally in a region without human introduction. Learn more.

A blend of locally adapted plant species for habitat restoration or naturalized gardens. Learn more.

The use of beneficial insects, birds, or companion planting to manage pest populations without synthetic chemicals. Learn more.

The death of plant tissue, often appearing as brown or blackened patches on leaves, stems, or fruit. Learn more.

showing tissue death or decay. Learn more.

A sweet liquid produced by flowers to attract pollinators. Learn more.

The gland or structure in a flower that secretes nectar. Learn more.

a type of leafminer that feeds inside conifer needles. Learn more.

Microscopic roundworms; some species are plant parasites while others are beneficial. Learn more.

Microscopic roundworms that feed on plant roots, causing galls, stunted growth, and yield loss. Learn more.

microscopic roundworms that live in soil or plant tissues; some are pests. Learn more.

The role and position of an organism within its environment, including its interactions with other species. Learn more.

A nutrient imbalance causing uniform yellowing of older leaves and reduced plant vigor. Learn more.

A soil conservation method that avoids turning the soil, preserving structure and beneficial organisms. Learn more.

active at night; applied to insects or animals that fly or feed after dark. Learn more.

The point on a stem where leaves, buds, or branches originate. Learn more.

the joints or points on a stem where leaves or buds originate. Learn more.

A reusable plastic or biodegradable container used for growing and selling plants. Learn more.

A hard, one-seeded fruit that does not split open at maturity, such as an acorn. Learn more.

A small nut or a segment of a fruit that resembles a nut. Learn more.

immature forms of insects that resemble adults but lack fully developed wings or reproductive organs. Learn more.

Heart-shaped with the notch at the tip rather than at the base. Learn more.

Reverse of lanceolate; broadest above the middle and tapering toward the base. Learn more.

Longer than broad, with nearly parallel sides. Learn more.

Shaped like an egg, with the broader end at the top. Learn more.

a blister-like swelling in plant tissues caused by excessive water uptake. Learn more.

Swelling or blistering of leaves due to excessive water uptake and poor transpiration. Learn more.

Fungus-like microorganisms responsible for diseases such as downy mildew and root rot. Learn more.

Plants pollinated by natural mechanisms, producing offspring true to type if isolated. Learn more.

leaves or buds arranged in pairs at the same level on opposite sides of a stem. Learn more.

A process verifying that food or products are produced according to organic farming standards. Learn more.

Decomposed plant or animal residues that improve soil fertility and structure. Learn more.

Mulch derived from plant or animal materials such as leaves, straw, or bark. Learn more.

The part of the pistil that contains ovules and develops into fruit. Learn more.

Sowing seed into existing turf to thicken coverage or introduce new varieties. Learn more.

the ability of an organism or plant to survive through the winter season in a dormant or protected state. Learn more.

The structure within the ovary that develops into a seed after fertilization. Learn more.

a naturally occurring acid in plants; high concentrations can be toxic. Learn more.

The upper of the two bracts enclosing the flower in grasses. Learn more.

having leaflets or veins radiating from a single point like the fingers of a hand. Learn more.

a branching flower cluster in which the branches are themselves racemes. Learn more.

A tuft of hairs or bristles attached to the seed of many members of the daisy family, aiding in dispersal. Learn more.

The portion of the light spectrum (400–700 nm) used by plants for photosynthesis. Learn more.

organisms that live on or within another organism (the host) and obtain nutrients from it. Learn more.

relating to an organism that depends on a host for nourishment, often harming it. Learn more.

Fundamental plant tissue composed of living, thin-walled cells functioning in photosynthesis, storage, and regeneration. Learn more.

Any organism such as a virus, bacterium, or fungus that causes disease in plants. Learn more.

A fungal disease of peaches and nectarines causing distorted, reddened leaves and reduced yield. Learn more.

The stalk that supports a single flower in an inflorescence. Learn more.

The branch of soil science that studies the formation, classification, and mapping of soils in their natural environment. Learn more.

The main stalk of a flower cluster or solitary flower. Learn more.

A Botrytis infection of peony causing blackened buds and stems in cool, wet weather. Learn more.

A plant that lives for more than two years, often flowering annually once mature. Learn more.

A flower containing both stamens and carpels (male and female reproductive organs). Learn more.

The outer, non-reproductive part of the flower, composed of calyx and corolla. Learn more.

The wall of a ripened ovary or fruit, typically divided into three layers. Learn more.

Expanded volcanic glass used to improve aeration and drainage in potting mixes. Learn more.

A design system for sustainable living and agriculture modeled after natural ecosystems. Learn more.

Paving materials designed to allow water to infiltrate into the ground, reducing stormwater runoff. Learn more.

Remaining attached instead of falling off, as in leaves or sepals that stay on the plant. Learn more.

A segment of the corolla, typically colored and serving to attract pollinators. Learn more.

The stalk that connects a leaf blade to the stem, supporting leaf orientation for light capture. Learn more.

A measure of soil acidity or alkalinity influencing nutrient availability and microbial activity. Learn more.

The observable physical and physiological traits of an organism, determined by genotype and environment. Learn more.

a chemical signal released by an organism to influence the behavior of others of the same species. Learn more.

The vascular tissue that transports sugars and other products of photosynthesis. Learn more.

Long, thick-walled sclerenchyma fibers associated with the phloem that provide mechanical support. Learn more.

The length of day and night that influences flowering and vegetative growth in plants. Learn more.

Physiological responses of plants to the relative lengths of day and night. Learn more.

sensitive or responsive to light. Learn more.

The process by which plants convert light energy into chemical energy in the form of sugars. Learn more.

The use of solar panels to power water pumps for energy-efficient irrigation. Learn more.

A flattened petiole or leaf stalk that functions as a leaf blade. Learn more.

A plant disease symptom in which floral parts become leaf-like, often caused by phytoplasmas. Learn more.

The arrangement of leaves on a stem. Learn more.

relating to biological functions and processes in living organisms. Learn more.

Root and crown rots caused by Phytophthora species in poorly drained soils. Learn more.

Diseases caused by wall-less bacteria that inhabit phloem tissue, transmitted by leafhoppers. Learn more.

Removing the tip of a stem to encourage branching and a bushier habit. Learn more.

Leaflets arranged on either side of a central axis, resembling a feather. Learn more.

The female reproductive organ of a flower, consisting of the stigma, style, and ovary. Learn more.

The soft, spongy central tissue in the stems of vascular plants. Learn more.

The ability of a plant to survive adverse conditions such as cold or drought. Learn more.

The prepared cavity in soil for placing a plant at transplanting. Learn more.

A small, individual seedling grown in a cell for efficient handling and transplanting. Learn more.

The embryonic shoot or first leaf of a developing seedling. Learn more.

A dry fruit that splits open on two sides when mature, typical of legumes. Learn more.

A pruning system where upper branches are cut back to promote a dense head of regrowth. Learn more.

Microscopic grains produced by anthers that contain male gametes for fertilization. Learn more.

The transfer of pollen to enable fertilization and seed production. Learn more.

Any animal or agent that transfers pollen from the male to the female structures of flowers. Learn more.

A continuous habitat that supports bees, butterflies, and other pollinators across landscapes. Learn more.

Flowering and fruiting multiple times during its lifespan. Learn more.

Having separate petals that are not fused together. Learn more.

The condition of having more than two complete sets of chromosomes, common in many plant species. Learn more.

Having separate sepals rather than fused ones. Learn more.

An essential plant macronutrient involved in water regulation and enzyme activation. Learn more.

A soilless or blended medium formulated for container-grown plants. Learn more.

A fungal disease that produces a white, powdery coating on leaves, stems, and flowers. Learn more.

A disease of potato tubers causing corky lesions and vectoring powdery scab pathogens. Learn more.

preferring to feed on other living organisms; predatory. Learn more.

animals or insects that hunt and consume other organisms. Learn more.

feeding on other living organisms; acting as a predator. Learn more.

Transplanting small seedlings to give them space to develop. Learn more.

Aerial root that provides additional support to the stem, as in corn or banyan trees. Learn more.

A method of cloning plants under sterile laboratory conditions using small pieces of tissue. Learn more.

growing flat on or near the ground rather than upright. Learn more.

The condition in which the male parts of a flower mature before the female parts, reducing self-pollination. Learn more.

The condition in which the female parts of a flower mature before the male parts. Learn more.

Handheld cutting tools used for pruning small stems and branches. Learn more.

Selective removal of plant parts to improve structure, health, or flowering. Learn more.

the nonfeeding, often immobile, transformation stage between larva and adult in insects with complete metamorphosis. Learn more.

plural of pupa; the transitional, inactive stage of holometabolous insects. Learn more.

to become a pupa; to undergo the pupal stage in metamorphosis. Learn more.

Isolating new or diseased plants to prevent spread of pests or pathogens. Learn more.

Managing moisture, aeration, and carbon-to-nitrogen ratio to accelerate decomposition. Learn more.

The main axis of a compound leaf or inflorescence. Learn more.

A landscaped area designed to collect and absorb stormwater runoff from roofs or paved areas. Learn more.

The collection and storage of rainwater for landscape irrigation and other uses. Learn more.

An elevated growing area that improves drainage, soil quality, and access. Learn more.

A gardening method using slightly elevated rows to improve drainage and soil warmth. Learn more.

The part of a flower that supports the floral organs; in fruits, it may form edible tissue. Learn more.

to regrow or replace lost or damaged tissue. Learn more.

A holistic approach to farming that restores soil health, biodiversity, and ecosystem function. Learn more.

Energy derived from sources that are naturally replenished, such as solar, wind, or hydropower. Learn more.

A horizontal underground stem capable of producing roots and shoots at nodes. Learn more.

underground horizontal stems that send out roots and shoots from their nodes. Learn more.

rope-like bundles of fungal hyphae that help transport nutrients. Learn more.

The soil zone influenced by root exudates and associated microorganisms. Learn more.

The community of microorganisms living in the soil closely associated with plant roots. Learn more.

A viral disease causing circular chlorotic or necrotic patterns on leaves or fruit. Learn more.

A garden designed with rocks and alpine plants adapted to well-drained conditions. Learn more.

Physical injury to plant roots, bark, or stems caused by gnawing mammals such as voles or mice. Learn more.

The underground organ of a plant that absorbs water and nutrients. Learn more.

The mass of roots and adhering growing medium when a plant is removed from its container. Learn more.

A condition where roots circle densely in a container, restricting growth. Learn more.

A propagation technique using sections of roots to produce new plants. Learn more.

A tiny hairlike outgrowth on a root that increases surface area for absorption. Learn more.

Galls or swellings on roots caused by nematode infestation. Learn more.

The larval stage of certain flies that feed on plant roots, causing stunted growth or wilting. Learn more.

A condition where roots decay due to overwatering or soilborne fungi such as Pythium and Phytophthora. Learn more.

The root-bearing part of a grafted plant onto which a scion is attached. Learn more.

a circular cluster of leaves radiating from a central stem near the ground surface. Learn more.

a short, bunchy pattern of plant growth forming a compact rosette. Learn more.

fine fabric or mesh placed over crops to protect them from insects and frost. Learn more.

A horizontal stem or stolon that grows along the ground and produces new plants at its nodes. Learn more.

brownish, roughened areas on fruit skin caused by cork formation. Learn more.

the formation of brownish corky patches on fruit skin, often cosmetic. Learn more.

a plant disease producing orange-brown pustules caused by rust fungi. Learn more.

A common fungal infection producing orange or brown pustules on leaves and stems. Learn more.

Accumulation of soluble salts in soil that can impair plant growth. Learn more.

A winged achene that is dispersed by wind, as in maples. Learn more.

Soil dominated by large particles with rapid drainage and low nutrient-holding capacity. Learn more.

the removal or destruction of diseased plant material and contaminated tools to prevent spread. Learn more.

A watery fluid that circulates through a plant’s vascular system. Learn more.

A plant or fungus that obtains nutrients from decaying organic matter. Learn more.

a condition in which soil pores are completely filled with water. Learn more.

a wasp-like insect whose larvae resemble caterpillars and feed on foliage. Learn more.

A plant disease causing rough, corky lesions on fruit, leaves, or tubers, often fungal in origin. Learn more.

Small, immobile insects that attach to plant stems and leaves, feeding on sap and excreting honeydew. Learn more.

The process of breaking or softening a seed coat to encourage germination. Learn more.

Physically or chemically weakening a seed coat to encourage germination. Learn more.

The shoot or bud used in grafting that forms the above-ground part of the plant. Learn more.

Strengthening plant tissue with thick, lignified cell walls that provide rigidity to stems and leaves. Learn more.

A fungal disease producing cottony white growth and black sclerotia on stems and fruit. Learn more.

browning or burning of leaf margins due to stress, disease, or heat. Learn more.

Grass-like plants of the family Cyperaceae often used in ornamental plantings. Learn more.

The mature ovule containing an embryo and stored nutrients for germination. Learn more.

The protective outer covering of a seed. Learn more.

A state in which viable seeds fail to germinate until specific conditions are met. Learn more.

A sterile, fine-textured medium optimized for germinating seeds. Learn more.

A young plant that has recently emerged from a seed. Learn more.

The process of choosing plants with desired traits for breeding or cultivation. Learn more.

Fertilization of a flower by its own pollen, ensuring genetic uniformity in offspring. Learn more.

A planter with a reservoir that supplies water to the soil via capillary action. Learn more.

The outermost floral organs that typically protect the developing flower bud. Learn more.

the outer floral parts that form the calyx and protect the developing bud. Learn more.

A fungal disease causing small, dark-bordered spots on leaves of tomato and other crops. Learn more.

tooth-like edges along a leaf margin. Learn more.

Attached directly without a stalk, as in sessile leaves or flowers. Learn more.

Fabric used to reduce sunlight and heat for plants in greenhouses or outdoor beds. Learn more.

A planting designed for low-light conditions beneath trees or structures. Learn more.

A structure covered with shade cloth that reduces sunlight exposure for delicate or shade-loving plants. Learn more.

A plant’s capacity to grow under reduced light levels. Learn more.

tubular structures that encase or protect other plant organs, such as leaf bases. Learn more.

A layering technique using cardboard and organic matter to smother weeds and build soil. Learn more.

a curved symptom of shoots resembling the handle of a cane, often from disease. Learn more.

small round holes in leaves formed when diseased tissue falls out. Learn more.

a hard mineral compound (silicon dioxide) present in plant tissues. Learn more.

An elongated seed capsule that splits open when mature, typical of the mustard family. Learn more.

Fine soil particles intermediate between sand and clay in size. Learn more.

A leaf that is not divided into leaflets. Learn more.

feeding damage that removes leaf tissue but leaves the veins intact. Learn more.

Coarse mineral material used to improve drainage and aeration. Learn more.

Soft-bodied mollusks that feed on leaves and seedlings, leaving slime trails and irregular holes. Learn more.

A group of fungal diseases that produce black, powdery spores on cereals and grasses. Learn more.

A porous hose that releases water slowly along its length for irrigation. Learn more.

The natural medium for plant growth composed of minerals, organic matter, water, and air. Learn more.

The carbon stored in soil organic matter, vital for fertility and climate regulation. Learn more.

Compression of soil that reduces pore space, limiting air and water movement. Learn more.

The continued capacity of soil to function as a living ecosystem that sustains plants, animals, and humans. Learn more.

A distinct layer of soil with specific physical and chemical characteristics, forming part of a soil profile. Learn more.

The organic fraction of soil derived from decomposed residues and organisms. Learn more.

The vertical section of soil showing all its horizons, revealing structure, texture, and composition. Learn more.

The arrangement of soil particles into aggregates influencing porosity and root growth. Learn more.

The system used to classify soils based on their physical, chemical, and biological properties. Learn more.

Analytical assessment of soil properties to guide fertilization and amendments. Learn more.

The proportion of sand, silt, and clay in soil, determining water retention and aeration. Learn more.

Using clear plastic to trap solar heat and reduce soilborne pests and weeds. Learn more.

A complex of superficial fungal blemishes on apple fruit surfaces. Learn more.

Black fungal growth that develops on honeydew deposits from aphids and scale insects. Learn more.

A thick, fleshy spike of flowers often enclosed by a spathe, as in arums. Learn more.

A large bract that encloses a spadix. Learn more.

Tiny arachnids that feed on plant sap, causing stippling, webbing, and leaf discoloration. Learn more.

An unbranched, elongated inflorescence with sessile flowers. Learn more.

An unbranched inflorescence with sessile flowers along the stem. Learn more.

the small flower clusters that make up a grass or cereal inflorescence. Learn more.

a type of unbranched flower cluster with sessile flowers along the main stem. Learn more.

occurring irregularly or unpredictably, such as periodic pest outbreaks. Learn more.

A reproductive unit capable of developing into a new organism without fusion with another cell. Learn more.

reproductive cells produced by fungi, ferns, and some plants capable of developing into a new organism. Learn more.

The diploid stage of a plant that produces spores by meiosis. Learn more.

Applying water to crops by spraying it into the air and letting it fall like rain. Learn more.

The male reproductive organ of a flower producing pollen. Learn more.

the pollen-producing male reproductive organs of a flower. Learn more.

Fungal infection causing decay at the base or crown of plants, leading to collapse. Learn more.

unable to produce viable seed, pollen, or offspring. Learn more.

The sticky tip of the pistil that captures pollen during fertilization. Learn more.

tiny pale or yellow spots on leaves caused by piercing-sucking insects like mites or leafhoppers. Learn more.

small leaflike appendages at the base of a leaf stalk. Learn more.

A horizontal above-ground stem that takes root at points along its length. Learn more.

A horizontal stem that grows along the surface and produces new plants at nodes. Learn more.

horizontal above-ground stems that root at their nodes to form new plants. Learn more.

A microscopic pore in leaves and stems that regulates gas exchange. Learn more.

Exposing seeds to moist chilling or other conditions to break dormancy. Learn more.

The slender stalk of the pistil connecting the stigma to the ovary, guiding pollen tubes. Learn more.

The gradual process of change in species composition and community structure over time. Learn more.

A plant with thickened, water-storing tissues adapted to arid conditions. Learn more.

A shoot arising from a plant’s root system or base, often removed to direct growth. Learn more.

Farming that meets current food needs without compromising the environment or future generations. Learn more.

The level of resource harvest that can be maintained without degrading the ecosystem. Learn more.

visible signs or changes in a plant resulting from disease or stress. Learn more.

referring to a substance or infection that moves internally through plant tissues. Learn more.

A primary, dominant root that grows downward from a seedling. Learn more.

The classification of plants into hierarchical groups based on relationships. Learn more.

A slender climbing organ that twines around a support. Learn more.

Definition

located at or forming the tip of a stem or branch. Learn more.

The receptacle or axis on which floral parts are borne. Learn more.

A plant body not differentiated into root, stem, and leaves, as in algae or lichens. Learn more.

A dense layer of organic material accumulating at the soil surface in turf. Learn more.

A controlled composting process using high temperatures to accelerate decomposition and kill pathogens. Learn more.

Materials that absorb and store heat energy during the day and release it slowly at night to stabilize temperatures. Learn more.

Removing excess seedlings or branches to reduce competition and improve growth. Learn more.

Minute insects that feed by rasping and sucking, causing silvered patches on leaves and deformed flowers. Learn more.

Mechanical manipulation of soil to prepare the seedbed or control weeds. Learn more.

Applying a thin layer of material such as compost over soil or turf. Learn more.

Training and pruning plants into defined shapes. Learn more.

poisonous to living organisms. Learn more.

a poisonous chemical substance, often the active ingredient in a pesticide. Learn more.

the degree to which a substance is poisonous. Learn more.

a naturally occurring poison produced by living organisms such as plants, fungi, or bacteria. Learn more.

Water vapor loss from plant surfaces, primarily leaves. Learn more.

Physiological stress experienced by plants after moving to a new location. Learn more.

A framework that supports climbing plants or espaliered branches. Learn more.

Plastic or string mesh attached to trellises to support climbing plants. Learn more.

The position an organism occupies in a food chain, such as producer, consumer, or decomposer. Learn more.

A small hand tool used for digging and planting. Learn more.

A shallow wooden basket used for carrying produce or tools in the garden. Learn more.

An enlarged, fleshy underground stem storing nutrients, such as in potatoes. Learn more.

Grasses maintained as a lawn or playing surface. Learn more.

An inflorescence with stalks of nearly equal length radiating from a common point. Learn more.

Planting low-growing species beneath taller plants to fill space and suppress weeds. Learn more.

The practice of cultivating, processing, and distributing food in or around cities. Learn more.

A high-nitrogen fertilizer widely used in agriculture and gardening. Learn more.

A map of minimum winter temperatures used to guide plant selection. Learn more.

Color variation in leaves or stems due to genetic or physiological factors. Learn more.

A strand of xylem and phloem tissues that transport water, nutrients, and sugars throughout the plant. Learn more.

A plant with specialized tissue (xylem and phloem) for transporting fluids. Learn more.

The frequency at which air is exchanged in a greenhouse, controlling temperature, humidity, and CO₂ levels. Learn more.

Expanded mica used to increase water retention and aeration in potting media. Learn more.

The cultivation of earthworms for composting and improving soil fertility. Learn more.

Exposure to a period of cold required by some plants to initiate flowering. Learn more.

Growing plants on structures or walls to maximize space. Learn more.

A species causing Verticillium wilt in many woody and herbaceous plants. Learn more.

A soilborne fungal disease that clogs vascular tissue, leading to leaf yellowing and plant death. Learn more.

the ability of seeds or organisms to live, grow, or germinate. Learn more.

capable of living or developing under favorable conditions. Learn more.

A plant with long, flexible stems that climb, sprawl, or twine. Learn more.

pertaining to viruses or viral diseases. Learn more.

Microscopic pathogens that invade plant cells, often spread by insects, causing mottling or stunting. Learn more.

A pathogenic agent causing systemic or localized disease symptoms in plants. Learn more.

Testing plant material to ensure it is free from specific viruses before propagation. Learn more.

plural of virus; infectious agents composed of genetic material within a protein coat. Learn more.

Strategies and technologies used to reduce water usage and waste in gardening and agriculture. Learn more.

The process by which water enters and moves downward through the soil surface. Learn more.

Saturation of soil with water, depriving roots of oxygen. Learn more.

An area of land that drains all rainfall and runoff into a common outlet such as a river or lake. Learn more.

Designing gardens to use minimal supplemental irrigation. Learn more.

A plant growing where it is not wanted, often competing with cultivated plants. Learn more.

A physical sheet or fabric used to suppress weed growth by excluding light. Learn more.

The reserve of viable weed seeds present in the soil. Learn more.

Beetles with elongated snouts whose larvae feed within seeds, roots, or stems. Learn more.

A single- or dual-wheeled cart used to move materials in the garden. Learn more.

Small, sap-sucking insects that excrete honeydew and transmit plant viruses, common in greenhouses. Learn more.

a circular arrangement of three or more leaves, petals, or other organs at the same node. Learn more.

Loss of rigidity in nonwoody plants due to water stress, disease, or root damage. Learn more.

A row of trees or shrubs planted to reduce wind speed and protect plantings. Learn more.

A tree or shrub planted to reduce wind speed and soil erosion. Learn more.

thin membranous extensions of plant or insect structures, such as petals or seeds. Learn more.

Sowing seeds outdoors in covered containers during winter for natural stratification. Learn more.

dense clusters of abnormal shoot growth caused by disease or pests. Learn more.

A container system for vermicomposting using composting worms. Learn more.

Landscaping designed to reduce or eliminate the need for irrigation, common in arid regions. Learn more.

A plant adapted to survive in an environment with little water. Learn more.

The vascular tissue that conducts water and dissolved minerals from roots upward. Learn more.

Radial sheets of parenchyma cells in xylem that transport water and nutrients laterally within stems. Learn more.

A symptom of nutrient deficiency, waterlogging, or disease leading to pale or yellow leaves. Learn more.

The amount of produce harvested from a plant or area. Learn more.

The difference between potential and actual crop yields due to environmental or management factors. Learn more.

A small, rooted plant grown in a cell tray for efficient transplanting. Learn more.

Crop or garden establishment without prior soil tillage to conserve structure and moisture. Learn more.

A gardening philosophy that minimizes waste through composting, reuse, and efficient resource use. Learn more.

Insufficient zinc causing stunted growth and leaf chlorosis. Learn more.

A fungal disease forming concentric ring patterns on leaves, characteristic of Gloeocercospora sorghi. Learn more.

A classification based on minimum temperatures to indicate plant survivability. Learn more.

The diploid cell resulting from fertilization of an egg by a sperm. Learn more.