Gardening Terms

Glossary of Terms

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B

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

bacterial
relating to or caused by bacteria. Learn more.

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

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

bacterial spot (fruit trees/vegetables)
Bacterial infections that cause leaf spots and fruit blemishes on stone fruit and peppers. Learn more.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

black spot (rose)
A common fungal disease on roses producing circular black lesions on leaves. Learn more.

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

blanching (horticulture)
Excluding light from plant parts to keep them pale and tender. Learn more.

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

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

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

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

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

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

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

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

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

botrytis blight (gray mold)
A fungal disease that infects flowers, leaves, and fruit under cool, damp conditions. Learn more.

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

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

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

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

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

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

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

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

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

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

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