Glossary of gardening terms - B:

Backfill
Soil that is returned to a planting hole after planting. Backfill should be amended with rich organic material to improve the texture.

Balled and burlapped
Some trees and shrubs are dug from the field and sold with a large ball of soil around their roots. This ball of soil is traditionally wrapped with burlap cloth but may also be wrapped with a plastic cloth or wire mesh.

Barbecue
Barbecue, (also spelled barbeque, or abbreviated BBQ) is a method of cooking food with the radiant heat and/or hot gasses of a fire, the cooking of food in a sauce that includes vinegar, the end-result of cooking by one of these methods, or a party that includes such food. Barbecue is usually cooked in a covered environment heated by an outdoor open flame of wood, charcoal, natural gas or propane. ...

Bare root
Deciduous shrubs and trees with all soil removed from their roots.

Biannual
A plant whose life cycle extends over two growing seasons. The first year the seed germinates and produces a seedling that usually remains short of the winter. The second growing season the seedling rapidly grows, flowers, produces seeds and then dies.

Bulb
A bulb is an underground vertical shoot that has modified leaves (or thickened leaf bases) that are used as food storage organs by a dormant plant. Other types of storage organs (such as corms, rhizomes, and tubers) are sometimes erroneously referred to as bulbs. The correct term for plants that form underground storage organs, including bulbs as well as tubers and corms, is geophyte.