Hybrid moisture-loving perennial with deeply divided ferny dark foliage and feathery flame-shaped flower plumes in white, pink, salmon, red, or magenta through summer. Mainstay of damp shade plantings.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 4–8 | −34.4 °C to −6.7 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 4–8 | −29 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in moist dappled shade — astilbes flower poorly in dry conditions, demand consistent soil moisture
- Flowers June–August depending on cultivar — different cultivar groups extend the flowering season
- Faded flower plumes provide good winter structure if left standing
- Divide every 3–4 years to maintain vigorous flowering