Gardening Terms

Glossary of Terms

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umbel
An inflorescence with stalks of nearly equal length radiating from a common point. Learn more.
underplanting
Planting low-growing species beneath taller plants to fill space and suppress weeds. Learn more.
urban farming
The practice of cultivating, processing, and distributing food in or around cities. Learn more.
urea fertilizer
A high-nitrogen fertilizer widely used in agriculture and gardening. Learn more.
USDA Plant Hardiness Map
A map of minimum winter temperatures used to guide plant selection. Learn more.