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A picture of a Rosebay Willowherb

Rosebay Willowherb

Epilobium angustifolium

Also known as

Great Willow-Herb, Fireweed, French-Willow, Blooming Sally, Great willowherb, Wickup, Willowherb

Maitohorsma (Epilobium angustifolium) by kallerna (CC BY-SA 3.0)

Full Sun
Moderate care
Moderate watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size









  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Rosebay Willowherb

A Chamaenerion angustifolium with pink flowers growing in the wild
A photo of Rosebay Willowherb
A photo of Rosebay Willowherb
A photo of Rosebay Willowherb
A photo of Rosebay Willowherb

Rosebay Willowherb Overview

Epilobium angustifolium is a rhizomatous perennial species in the evening primrose family, Onagraceae. Rhizomes are plant stems that are modified to grow horizontally, typically under the soil surface, they possess the ability to grow roots and shoots to form a new plant, even if the connection to the main plant is severed. Thus whole new plants can grow from small rhizome fragments left in the soil. Many species that possess rhizomes are invasive and this is why they are so hard to eradicate. This plant has an upright, spreading habit and can grow to around 1.5m tall and 2.5m wide.

How to propagate Rosebay Willowherb


You can propagate the species by seeds in the autumn.


Selected forms by softwood cuttings from side-shoots in the spring.

Special features of Rosebay Willowherb

Attractive flowers

Other uses of Rosebay Willowherb

Borders, naturaliser, wild flower.