Perennials add color and texture to shady areas. Perennials that tolerate dry, shaded sites include the wild ginger (Asarum canadense), a tiny perennial that grows from 6 to 10 inches tall. The wild ginger blooms with purple to brown flowers in early spring, but this perennial is generally grown for its large, heart-shaped foliage.
Bergenia (Bergenia cordifolia) can tolerate the conditions found under cedar trees. This pink-blooming perennial grows from 12 to 18 inches tall and prefers partial shade. Bergenia has shiny, evergreen foliage and grows in dense clumps.
Ground covers fill in empty spaces and prevent soil erosion and runoff. The myrtle or periwinkle (Vinca minor) grows from 6 to 12 inches tall and tolerates both shade and dry soil. This trailing evergreen has thin stems and glossy, dark green foliage. Myrtles produce blue spring flowers.
Trailing arbutus (Epigaea repens), a North American native, grows to 6 inches tall and up to 2 feet wide. This evergreen grows in a dense, thick mat and has leathery, thick foliage. The trailing arbutus blooms with fragrant, white to pink flowers in spring and grows naturally under evergreen canopies.
When choosing deciduous shrubs for shaded sites, choose species with light-colored flowers to add contrast. The pinxterbloom azalea (Rhododendron periclymenoides) prefers rich, acidic soil but tolerates thin, dry soils. This deciduous shrub grows from 4 to 6 feet tall and blooms in late spring with clusters of pink flowers. Plant pinxterbloom azaleas in partial shade.
The mapleleaf viburnum (Viburnum acerifolium) grows best in shade and well-drained, slightly acidic soil. This 4- to 6-foot-tall shrub blooms with yellow to white flowers in late spring to early summer, followed by long-lasting black berries. Mapleleaf viburnum have large, triple-lobed foliage that turns red to purple in fall.
Evergreen shrubs keep their foliage all year, unlike deciduous species. The mountain laurel's (Kalmia latifolia) natural habitat is at the edge of forested sites. This evergreen shrub grows from 5 to 12 feet tall with a similar spread and grows in shaded sites with cool soil. Mountain laurels produce showy, long-lasting pink to white flowers in late spring.
The wintercreeper euonymus (Euonymus fortunei), a semievergreen, starts as a vine and matures into a shrublike form. The euonymus has dark-green foliage with silver to white markings and tolerates a range of site conditions, including shady and dry.