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(Epilobium tetragonum)
Square-Stalked Willow Herb (Epilobium tetragonum)
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© Fabien Piednoir
CC BY-SA 4.0
Image By:
© Fabien Piednoir
Recorded By:
Copyright:
CC BY-SA 4.0
Copyright Notice:
Photo by: © Fabien Piednoir | License Type: CC BY-SA 4.0 | License URL: http://creativecommons.org/licenses/by-sa/4.0/ | Uploader: fabienpiednoir | Publisher: iNaturalist |
Estimated Native Range
Climate Requirements for Ensley, Florida
| This Plant | Your Site | Plant Suitability for Your Location | ||
|---|---|---|---|---|
| • Precipitation | 5" - 110" | 65" | Aquatic | Aquatic |
| • High Temp. | 45°F - 100°F | 91°F | Your summer temperatures are normal for this plant. | Excellent |
| • Low Temp. | -14°F - 59°F | 41°F | Your winter temperatures are normal for this plant | Excellent |
This plant may not grow well at your location - your precipitation is too high.
Summary
Epilobium tetragonum, commonly known as square-stalked willow herb, is a perennial herb native to a variety of habitats including damp ground in open woodlands, along streams, and in meadows across Europe and parts of Asia. It typically grows from 0.3 to 4.3 feet tall and features a distinctive square-shaped stem. The plant produces small pink to purplish flowers from June to September, which are modest in appearance but can be quite numerous, creating a delicate display. The leaves are lance-shaped and arranged in opposite pairs along the stem.
Square-stalked willow herb is appreciated for its ability to thrive in moist, poorly drained soils and its use in naturalistic plantings and wildlife gardens. It can provide ground cover and is beneficial for pollinators. In cultivation, it requires moist soil and can tolerate partial shade to full sun. However, care should be taken as it can spread vigorously by rhizomes and self-seeding, potentially becoming a nuisance. It is not commonly afflicted by diseases or pests, but its invasive potential should be monitored.CC BY-SA 4.0
Square-stalked willow herb is appreciated for its ability to thrive in moist, poorly drained soils and its use in naturalistic plantings and wildlife gardens. It can provide ground cover and is beneficial for pollinators. In cultivation, it requires moist soil and can tolerate partial shade to full sun. However, care should be taken as it can spread vigorously by rhizomes and self-seeding, potentially becoming a nuisance. It is not commonly afflicted by diseases or pests, but its invasive potential should be monitored.CC BY-SA 4.0
Plant Description
- Plant Type: Herb
- Height: 1.5-2.5 feet
- Width: 1-2 feet
- Growth Rate: Rapid
- Flower Color: Pink
- Flowering Season: Summer
- Leaf Retention: Deciduous
Growth Requirements
- Sun: Full Sun, Part Shade
- Water: Medium
- Drainage: Medium, Fast
Common Uses
Low Maintenance, Water Garden
Natural Habitat
Damp ground in open woodlands, along streams, and in meadows across Europe and parts of Asia
Other Names
Common Names: Square-stalked Willowherb
Scientific Names: Epilobium tetragonum, Chamaenerion tetragonum, Chamaenerion tetragonum, Epilobium adnatoparviflorum, Epilobium adnatum, Epilobium adnatum f. rodriguezii, Epilobium adnatum f. stenophyllum, Epilobium adnatum var. rodriguezii, Epilobium decurrens
GBIF Accepted Name: Epilobium tetragonum