Also known as Annual Willowherb · Autumn Epilobium · Autumn Willowherb
Tall Annual Willowherb (Epilobium brachycarpum) is an upright annual wildflower with showy pink to purple flowers, thriving in open, sunny locations.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade
75% intensity
Thrives in full sun, but can tolerate light shade. More sun generally leads to better flowering and more compact growth.
Consistent moisture, but allow slight drying
50% intensity
Prefers well-drained soil and consistent moisture, especially during establishment and flowering. Avoid prolonged sogginess.
Well-drained, Sandy, Loam
50% intensity
Moderate
50% intensity
Prefers moderate temperatures. Protect from extreme heat and frost. As an annual, it completes its life cycle within a single growing season.
Low
25% intensity
Requires minimal fertilization. Over-fertilizing can lead to lush foliage at the expense of blooms.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water consistently to keep the soil moist, especially during dry periods. Allow the top inch of soil to dry out slightly between waterings.
Reduce watering in cooler weather or when the plant is not actively growing to prevent waterlogged conditions.
Pruning is generally not necessary for this annual species. Remove any dead or damaged stems if they appear.
Deadheading spent flowers can encourage a slightly longer blooming period and prevent unwanted self-seeding if desired.
Propagate from seed sown directly outdoors in early spring or late autumn. Seeds require light to germinate, so sow them on the surface of the soil. Germination typically occurs within 2-4 weeks.
This plant readily self-seeds.
Repotting is not typically applicable as Epilobium brachycarpum is an annual plant grown from seed. If attempting to overwinter a specimen (uncommon), a larger pot with well-draining soil would be necessary in autumn.
Identify plants like this with ePlant AI
Snap a photo to get care tips and match similar species on the go.
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Tall Annual Willowherb (Epilobium brachycarpum)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Myrtales |
| Family | Onagraceae |
| Genus | Epilobium |
| Species | Epilobium brachycarpum |
Similar in genus Epilobium
Answers based on plant encyclopedia data
