trefle.io · Taken Jul 31, 2021 by Daniel Bourget (cc-by-sa)
Onagraceae
American willowherb
Epilobium ciliatum
Also known as Fringed willowherb, Epilobium ciliatum, Purple-leaved willowherb
Native Plants · Native Wildflower · Part Shade · Moist Soil · Perennial · Wildlife Garden · Streamside · Groundcover · North American Native
American willowherb is a low-maintenance native perennial that thrives in moist, partially shaded spots such as stream banks or woodland edges. Water regularly to keep the soil consistently moist and avoid letting it dry out completely. It spreads naturally by seed and requires little intervention once established.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water thoroughly until soil is evenly moist; avoid waterlogging · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.5–7
- Temperature
- -20°F to 85°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 3 ft
- Spread
- 2 ft
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Alaska, Alberta, Aleutian Is., Altay, Amur, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Arizona, British Columbia, Bulgaria, Buryatiya, California, Central European Rus, Chile Central, Chile South, Colorado, Connecticut, Czechoslovakia
- Attracts
- Bees, Butterflies
Sources: trefle, usda
More Epilobium
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Epilobium angustifolium subsp. angustifolium
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Square-stemmed willowherb
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Hoary willowherb
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Broadleaf willowherb
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