Planting perennials

From Gardening Wiki

Planting Perennials

Now that the questions of fertilizers and soils are settled (see Perennial soil preparation), let us consider the planting. A rule is given in setting perennials to put them a trifle closer than half their height. For example, Columbine grows two feet tall; for good clumps place young plants one foot apart.

This rule will not apply in subsequent years, for as the plants grow they must be thinned out. A good, liberal planting is always the better plan. Plants should usually be set a little deeper than they were when growing in the nursery. Care must be exercised not to bury them too deeply, however, for some perennials, as Violets and German Iris, are almost surface creepers. In placing the perennials in the soil, spread the roots symmetrically; do not wad them and cram them into a little hole.

Spring Planting of Perennials

The planting of perennials is best done in Spring when the tops are just about to start into growth. There is danger in planting when the soil is too moist, especially clayey soils, which when they become caked are difficult to pulverize during the whole growing season.

Autumn Planting of Perennials

In the Autumn most perennials can be transplanted successfully if their roots get established before cold weather. If perennials must be moved in full growth they should always be cut back; especially is this the case when much soil is removed from the roots. All newly set stock should be watered. There is usually less work in Autumn than in the Spring, hence this season is often preferred for planting.