Tall eastern North American native prairie perennial with tiered whorls of narrow leaves and slim candle-like spires of white or pale lilac flowers in midsummer. Strong vertical accent in naturalistic planting.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–8 | −40 °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 3–8 | −34 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in moist sunny borders and prairie plantings — provides strong vertical lines at 1.5 m tall
- Excellent bee and butterfly forage — long flowering period through July and August
- Tolerates damp to wet soil — useful in rain gardens and pond surrounds
- Long lived once established
Categories
Related plants
Cross-check Culver’s root against your zones