Evergreens tend to be adversely affected by hot, dry summer weather and should be watered every 10 to 14 days at this time. Be sure the water reaches the deep-root growth, at least 6 inches deep. A mulch of grass clippings or peat moss will also protect the tree from loss of water in dry weather.

Pruning in late spring before new buds appear seems to help an evergreen thrive. Prune so that the inner branches can develop and the tree or shrub is more compact. Formal trees can be kept trim, with no ragged branches sticking out, and badly shaped or deformed trees can be corrected through shaping. Evergreens are susceptible to "winterburn" from too much wind and winter sun, so that they dry up and their branches crack under the weight of snow or the force of wind.

A precaution is to water them deeply before the ground freezes in the late fall. They may also be protected in winter by screens of burlap or straw mats. Where wind and winter sun are not too strong, shielding only on the sunny side is necessary. Burlap boxes or covers should be well ventilated. Thin, tall shrubs or small evergreen trees may be tied with strips of cloth, so that the branches will not crack. Old trees with heavy limbs may be propped with boards to prevent breakage under heavy snow or ice.

Shrubs, Hedges, Vines and Roses

In general, trees and shrubs are planted and cared for in the same way, the difference between them being chiefly one of height. One definition of the difference, however, is that while a tree has only one trunk, a shrub has several stems or trunks.

Not so long ago the number of reliable shrubs was quite limited, but today the many new hybrids have lengthened the list and the gardener's choice is almost endless. No matter the region, it is now possible to plant shrubs that will satisfy color needs, bloom at various seasons, cover bare spots where grass won't grow, or grow in such profusion and depth that screening purposes are served.