• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Chamaenerion angustifolium 'Album'

white rosebay willowherb

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  • Other common names white rosebay willowherb

  • Synonyms Chamerion angustifolium 'Album'
    Epilobium angustifolium 'Album'

    Epilobium angustifolium var. album
    Epilobium angustifolium f. leucanthum
    Epilobium angustifolium

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  • Family Onagraceae

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

  • Details 'Album' is a fast-growing, strongly-spreading, rhizomatous perennial forming an extensive patch of erect stems with white flowers 2cm across from mid-summer to early autumn


  • Foliage Deciduous

  • Habit Clump-forming

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)




  • Full Sun

  • Partial Shade

  • Aspect West-facing or South-facing or East-facing

  • Exposure Exposed or Sheltered


  • Chalk


  • Clay


  • Loam


  • Sand


  • MoistureMoist but well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAcid, Alkaline, Neutral


  • Ultimate height 1-1.5 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moist but well-drained, humus-rich soil in full sun or partial shade; vigorously spreading by rhizomes and can be invasive so site with care

Propagation Propagate by seed sown in a cold frame as soon as ripe or in spring. Propagate by division in spring or autumn. Propagate by softwood cuttings from side shoots in spring.

Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden Wildlife Gardens Wildflower meadow Prairie Planting

How to care

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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