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.
Shrubs are valuable to the gardener because they bridge the gap between trees and flowers. As do trees, they serve as boundary markers, soften the lines of buildings, act as a decorative background for flower beds and hide unsightly views.
Like flowers, they add character and shape to the garden, blooming forth with colorful blossoms and attracting birds with their berries. One big item in their favor is that they mature rapidly, yet remain as hardy and long-lived as trees.
Planting of shrubs is tittle different from planting of trees. Early spring is the most favorable time since it gives the plant a long spell of good growing weather to get reestablished. In the milder sections of the country, however, transplanting may be done through the winter months. In New England, evergreens may be planted in September and May, and deciduous shrubs in October and May.
Dry roots are the chief cause of planting failures, and steps should be taken to prevent this