Valued for light, airy quality of plumelike flower clusters and attractive foliage and for ability to provide color from late spring through summer. Leaves are typically divided, with toothed or cut leaflets, though in some species they are simply lobed, with cut margins. Small white, pink, or red flowers are carried in graceful, branching, feathery plumes held on slender, wiry stems ranging from 6 in. to 3 ft. or taller. Most plants grow 2–3 ft.wide.
Astilbes are the mainstay of the shady perennial border, although in cool-summer climates they can withstand full sun if watered adequately. Effective at the edge of pools, along shady paths, in containers. Need moist (but not boggy), rich soil with ample humus. Cut off faded flowering stems and divide clumps every 4 or 5 years. Survival in coldest areas (Zones 1a, 1b, 2a) depends on good snow cover.
Blooms in late summer, grows taller than A. x arendsii, and tolerates dryness a little better. Varieties include a range of sizes and flower colors.
From Japan. This stocky plant grows 8 in. to 1 1/2 ft. tall and 1 ft. wide, with nodding, two-tone flo...
This strain grows clumps 12–16 in. tall and wide, with flowers rising several inches higher. Upw...
Bright pinkish purple flowers in spikelike clusters that grow to 4–5 ft. tall.