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Herbaceous Perennial

Chamaenerion angustifolium 'Stahl Rose'
  • RHS Plants for pollinators

rosebay willowherb 'Stahl Rose'

A vigorous, upright, strongly-spreading perennial to about 1.5m tall, producing uprigh stems with long, narrow, willow-like leaves and tall spires of flowers, with pale pink petals offset by dark pink sepals, from mid-summer to early autumn, followed by long pink-tinged seed pods; seeds are cocooned in silky plumes

Synonyms
Chamerion angustifolium 'Stahl Rose'
Epilobium angustifolium 'Stahl Rose'

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
1.5–2.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Green
Autumn Pink Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

West–facing or South–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Onagraceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus

Chamaenerion can be annuals or perennials, sometimes invasive, with erect stems bearing willowy leaves and showy, 4-petalled flowers in terminal racemes

Name status

Accepted

How to grow

Cultivation

Grow in moist but well-drained, humus-rich soil in full sun or partial shade; has the potential to become a nuisance so site with care

Propagation

Propagate by seed, propagate by division in spring or autumn or propagate by softwood cuttings from side shoots in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Wildflower meadow
  • Wildlife gardens
Pruning

Deadhead to encourage repeat flowering and to prevent self-seeding

Pests

Can be damaged by slugs and snails

Diseases

May be affected by powdery mildews and a rust

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