• 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

Molinia caerulea subsp. arundinacea 'Windspiel'

purple moor-grass 'Windspiel'

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
purple moor-grass 'Windspiel'

© RHS

  • Other common names purple moor-grass 'Windspiel'

  • Family Poaceae

  • Genus Molinia are deciduous perennial grasses, tufted in habit, with flat, linear leaves and erect stems bearing open flowering panicles in summer

  • Details 'Windspiel' is a cultivar with an upright habit. Its slender flowering stems are borne at midsummer. Plants take on a honeyed and bleached appearance though the autumn

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • 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)

    H7

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Chalk

    Chalk

  • Sand

    Sand

  • Clay

    Clay

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHAcid, Neutral, Alkaline

Size

  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Will grow in any moderately fertile, moist but well-drained soil but prefers acidic soil

Propagation Propagate 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 last year's growth in early spring

Pests Generally pest free

Diseases Generally disease free

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