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Zone
Zones A2, A3, 1-9, 14-24, 32-45
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Full, Partial
Regular Water
Moderate

Astilbe x arendsii 'Color Flash'

False Spirea
Saxifragaceae
Perennials

ASTILBE

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.

 

Astilbe x arendsii
Astilbe x arendsii

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Astilbe x arendsii

Most astilbes sold belong to this hybrid group or are sold as such. Parentage is complex, but plants often have A. japonica, A. chinensis, and/or A. thunbergii in their ancestry. The plants differ chiefly in technical details. All can take full sun only in cooler climates. Short-lived in Zones 8, 9, 18–24.

'Color Flash'

Midseason. Pink flowers rise about 2 ft. above colorful foliage. Leaves gradually turn from green to burgundy.

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