Vase Form

In a plant, a manner of growth where the top springs from a single stem and spreads outward toward the top as the shape commonly taken by the American elm when growing in the open. For hedges see Plate V.

Vista

A view or prospect; commonly through or along an avenue of trees.

Wall Garden

A garden made by planting small plants in the crevices between the stones in a dry wall which is acting to support an earth embankment.

Warm Soil

A soil in which temperature conditions are such that normal root growth is active, and the root fibres attach themselves to the minute particles of soil.

Water Garden

A garden having a predominance of water-loving plants, with pools to sustain them.

Water-soaked Soil

A soil where excess moisture conditions cause the air voids to become clogged with water and air to be entirely excluded, thus causing a condition termed "drowning-out" of root systems.

Wild Garden

A garden on which little work has been done to disturb natural conditions, or a garden deliberately made to imitate natural conditions, the planting consisting chiefly of native plants, planted to get natural effects.

Wilt

Noun. A parasitic disease generally caused by the anthracnose fungus.

Windbreak

A planting composed of plants placed in such location as to shield certain areas from undesirable winds, usually the cold northwest winds of winter.

Wind-burn

An injury caused by the drying effect of wind upon soft bark or leaves of a plant.

Winter-killing

The death of plants in winter due generally to sudden changes of temperature or to the ground becoming frozen too deeply.

Yellows

A diseased leaf condition due to the breaking down or oxidizing of the plant leaf tissue caused by a ferment.

Zone (Planting)

An area characterized by a planting season of similar duration and dates for beginning and ending.