acre		cone bearing trees or shrubs
annual		plant that lives only through one growing season
arboretum		chemical used to control or prevent growth of bacteria
bactericide		young deciduous plants frequently dug and soil shaken from roots for transplant purposes
bare root		area devoted to the display of varieties of trees and shrubs for study and comparison
bedding plants		vegetables which do not thrive in summer heat like cabbage, lettuce, spinach, peas
biodegradable		plants sold in flats or cell packs for transplanting
bud		crops that have different harvest dates, but are grown in the same area at the same time
bulb		pinching off of flowers after they have wilted to prevent formation of seeds to promote flowering
chlorophyll		the part of the plant where the stem and root join
cold frame		material that can be decomposed by microorganisms found in soils
compost		box not artificially heated, but protects plants from elements
companion crops		green photosynthetic coloring matter found in plant leaves
conifers		undeveloped shoot where leaves or flowers arise like stem tips
cool crop		nutrient rich high organic residue made from aerobic decomposition of plants and animal residues
crown		plant structure made up of fleshy stems containing a growing point or flower bud
cultivar		land area containing 43,560 square feet or 210' X 210'
dead heading		plant type developed under cultivated conditions and from a single clone