WARM SEASON GRASS: Crops that are harmed by frost and do not grow well until the temperatures are above 70 degrees F.
WATER GARDEN: Any man made pool, forms, or container that aquatic plants are grown.
WEED: An uninvited and usually unattractive plant that surfaces in gardens. Usually invasive.
WET FEET: A condition when the roots of plants are in standing water. They will eventually rot.
WETABLE POWDER: A material that will not dissolve in water, but remains suspended in it. Most often referred to pesticides when used as sprays.
WETTING AGENT: A substance added to water that increases its ability to wet surfaces, especially those that are waxy or oily.
WHIP: A very young tree that still has a flexible trunk.
WHIP GRAFT: Graft in which the scion and rootstock are locked together tighter than in ordinary grafting.
WHORLED: Leaf form, where three or more leaves radiate from a single node.
WICK: A length of fibre or cloth that feeds liquid from a reservoir to a drier end.
WILDFLOWER: A herbaceous plant capable of growing, reproducing, and becoming established without cultivation or help from man.
WILT: A plant disease. This can be caused by bacteria or fungi. Often carried by insects.
WIND BREAK: A purposeful planting of hedges and trees to protect a field, home, or garden against forceful winds, providing a shelter and preventing damage.
WINDOW BOX: A plant or flower container placed below a window or on a window sill.
WINTER KILL: A condition that happens when plants have not hardened enough to withstand sever winter conditions.
WOODLAND GARDEN: This garden is usually established beneath deciduous trees. .
WOODY: Having hard, tough tissues that persist from year to year and are capable of producing shoot or flower buds.
WOODY PLANT: These are usually perennial plants such as vines, shrubs, trees, and bamboos, that have permanent stems.