• 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

Filipendula purpurea

purple meadowsweet

purple meadowsweet

© RHS 1999

  • Other common names purple meadowsweet

  • Synonyms Filipendula palmata purpurea

  • Family Rosaceae

  • Genus Filipendula are rhizomatous herbaceous perennials with pinnately divided leaves and large sprays of small rosy-pink or white flowers borne on leafy stems well above the foliage

  • Details F. purpurea is an herbaceous perennial to 80cm, with bold, palmately divided foliage and tiny, deep purplish-pink flowers in large, airy sprays

  • Plant range Japan

Characteristics

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or East-facing or North-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Clay

  • MoistureMoist but well-drained, Poorly-drained

  • SoilLoam, Clay

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in fertile, humus-rich, moist but well-drained or poorly-drained soil in full sun or partial shade

Propagation Propagate by seed sown in containers in spring, or by division in spring

Suggested planting locations and garden types Flower borders and beds Low Maintenance Cottage & Informal Garden

How to care

Pruning Cut back after flowering

Pests Generally pest free

Diseases Can be affected by fungal leaf spots; mildew may also be a problem

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