Astilbe plant profile
Astilbe x arendsii
A perennial flower for partial sun.
Last updated .
When to plant
When to plant Astilbe
Astilbe is a rhizomatous shade perennial set out as a plant or division. NC State says it is best divided about every four years, preferably in spring or fall; plant in spring or fall when the soil is workable so the clump establishes before heat or cold.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Astilbe in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Partial sun
- Lifecycle
- Perennial
- Spacing
- 12 to 36 in apart
- Hardiness
- Zones 3a to 9bFind my hardiness zone
Common problems
Watch for these
Also watch for: wilt, bacterial leaf spot, drought foliage decline.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Astilbe x arendsii (False Spirea, Hybrid Astilbe)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.