Rather than cutting all-branches off to an even length, prune out the older branches, even though they may be sound. With lilacs, for example, use a keyhole saw, and cut as close to the ground as possible, cutting out the oldest stems. Some shrubs need pruning every year, especially those which have dead branches as a result of winterkill. (These include some deutzias, hydrangeas, buddleia, spireas and privets.) Other shrubs such as rhododendron, azaleas, magnolia and buddleia should have the flower heads pruned off after blooming.
Types of Shrubs
Among the bewildering lists of shrubs, certain names stand out as new and unusual, or, on the other hand, tried and familiar. These include both the evergreen and deciduous types.
Rhododendron and azaleas (a type of rhododendron) head the list of evergreens with some 700 species. Hardy and long-lived, these ornamental woody plants have flowers of all shapes, colors and tints. Well-liked are the pink pearl, and the Rhododendron maximum, with its large pinkish flowers. Hardy hybrid species also are the Boule de neige (white) ; the Abraham Lincoln and Lady Armstrong (pink); theEverestianum (purple) ; and the Caractacus (red). Rhododendrons won't grow in limey soil, and humus should be supplied liberally to protect them from winter-burn.
Retaining wall and evergreen shrubbery for semi-formal front planting.
Azaleas thrive under the same conditions as rhododendrons—that is, in partial shade—and like rhododendrons in general may be used for foundation planting; they do well in thin woodlands. The Azalea malus has flowers in pastel shades of orange, yellow and tan.
Retaining wall and evergreen shrubbery for semi-formal front planting.