U
UMBEL – Flat topped clustered flower in which individual stems radiete from a common point like an umbrella.

UNDERPLANTING -Short plants growing on a ground cover under taller plants.

UNDERSTORY – Small trees that grow below the major forest.

V

 

VARIEGATED LEAF – Leaves that are marked with multiple colors that is usually blothced, edged or spotted.

VEGETATION – Term called for the area or territory of plants.

VERMICULITE – A light-weight, mineral called mica  that is sterile that is added to potting mixtures to improve growth of the roots that can retain its moisture and air within the soil.

VERNALIZATION – The time of cold days needed by certain plants to produce a bud.

VERTICILLIUM – A fungus disease that will cause wilting and death.

VIABILITY – The possibility of germination.

W

WARM SEASON GRASS – These grasses are grown in temperatures above 70 and 80 degrees. They will go dormant in winter.

WATER GARDEN – Man made pool, forms, or container that aquatic plants are planted.

WEED – An uninvited plant growing in the gardens.

WET FEET – A condition when the roots of plants are in standing water.

WETABLE POWDER – A material that will not dissolve in water, but remains suspended.

WHIP – A very thin shoot with no lateral branches of a woody plant.

WIDE ROW GARDENING – A method in which vegetables and cutting gardens are laid out usually two to three feet wide instead of a single file row of plants.

WILDFLOWER – Plants that can be native or exotic when growing out in a non-cultivated area.

WILT – A plant disease.

WINDOW BOX – A container placed under a window, very cottage-like in gardening decor.

WINTER KILL – A condition when plants have not hardened enough to withstand winter conditions.

WOODLAND GARDEN – A garden beneath deciduous trees.

WOODY PLANT – These are usually perennial plants (i.e.. vines, shrubs, trees, and bamboos) that have permanent stems. These branches get bigger every year.

X

XERISCAPE – A patented name for a landscaping method based on low water volume.