Rosebay Willowherb

Epilobium angustifolium

Great Willow-Herb, Fireweed, French-Willow

profile iconMaitohorsma (Epilobium angustifolium)
by kallerna (CC BY-SA 3.0)
1 of 15
Some pink Chamaenerion angustifolium flowers on a plant
profile iconMaitohorsma (Epilobium angustifolium)
by kallerna (CC BY-SA 3.0)
1 of 15
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.
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Planning

Difficulty

Moderate

Flowering time

Summer

Fruiting time

Spring

Special features

Attractive flowers

Environment

Light

Full Sun, Partial Shade, Partial Sun

Soil moisture

Moist

Soil type

Clay, Loam, Sand

Soil PH preference

Alkaline

Frost hardiness

Hardy

Personality

Family

Onagraceae

Flower colour

Pink, Purple, White

Scent

None
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Knowledge and advice

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