Tall white flower wands rise above leafy clumps, giving black cohosh a strong vertical presence in a shaded border. Decorative seedheads extend its interest after bloom.
Choose a sheltered position with rich soil that holds moisture. Allow time for this woodland perennial to establish.
Plant Details
- Growth habit: Upright, rhizomatous herbaceous perennial
- Mature size: About 4–7 ft tall and 2–4 ft wide
- Bloom color: White
- Bloom season: Early to midsummer
- Light: Partial shade to shade; some morning sun helps flowering
- Water: Consistently moist
- Soil: Rich, moisture-retentive, well-drained soil
- Hardiness: USDA zones 3–8
- Wildlife value: Flowers attract insects; foliage adds woodland structure
- Best uses: Shade borders and woodland gardens
- Native range: Eastern North America
- New England status: Native in parts of New England; introduced in Maine; absent from Vermont in Go Botany
Shelter tall flower stems from strong winds. This is an ornamental listing, with no medicinal-use claims.
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