B is for bee balm (12205 bytes)

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Bacillus thuringiensis (BT)
A species of bacteria that attacks soft bodied caterpillars and paralyzes their digestive system, leading to death.
 
Backfill
The soil replaced around the roots of a plant after planting.
 
B & B (Balled and Burlapped)
A shrub or tree, ready for planting, with a burlap-wrapped soil ball around its roots.
 
Bare Root
Some perennials, trees and shrubs with all soil removed from around their roots. Available for planting in the early spring.
 
Bearded
A petal bearing a tuft or row of long hairs.
 
Bedding Plant
Plants, usually annuals, used for temporary and often showy mass-plantings.
 
Beneficial Insects
Insects used in the biological control of garden pests; ladybugs and lacewings, for example.
 
Biennial
Plants that complete their life cycle in two growing seasons.
 
Biological Pest Control
Using living organisms such as beneficial insects or parasites to destroy garden pests.
 
Biomes
A major regional or global biotic community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate.
 
Blade
The flat extended part of a leaf.
 
Blanching
The process of depriving a plant of light in order to leave it pale and tender. A technique used with celery, endive, and forced rhubarb, among other plants.
 
Bleeding
The loss of sap from plant tissues which have been cut.
 
Bloom
The flower of a plant.
 
Bolt
The early production of a seed-stalk by a plant.
 
Bonsai
The art of dwarfing trees by careful root and stem pruning coupled with root restriction.
 
Border
A flower bed, usually consisting of a variety of plants.
 
Borer
A pest which bores into the stems of plants, usually a larva such as a grub, caterpillar, or maggot.
 
Bract
A modified leaf, often highly colored and sometimes mistaken for a petal. Examples of house plants with showy bracts are Poinsettia, Aphelandra and Bougainvillea.
 
Break
Production of a side shoot after removal of the growing point.
 
Bud
A growth bud occurs at the tip of a stem, or along the stem, and produces leafy growth. A fruit bud produces flowers, then fruits.
 
Bulb
Underground leaf buds that act as storage organs for a reserve of nutrients needed to complete the plant's life-cycle.

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CSU/Denver County  Extension Master Gardener 2010
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Date last revised: 01/05/2010