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Calamagrostis brachytricha

Korean feather reed grass

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
RHS Plant Shop from £17.99 Sold by 59 nurseries

  • Other common names Korean feather reed grass

  • Synonyms Achnatherum brachytricha
    Calamagrostis sylvatica

    Stipa brachytricha

    see more

  • Family Poaceae

  • Genus Calamagrostis are robust rhizomatous perennial grasses, forming tufts of linear leaves, with erect stems bearing dense branching flowering panicles in summer

  • Details C. brachytricha forms a clump of glossy green, linear leaves turning yellow in autumn, with narrow, fluffy, purple-tinged plume-like sprays of flower opening in late summer and early autumn and persisting into the winter

  • Plant range C to E Asia

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • 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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Tolerant of a range of conditions but best in moisture retentive well-drained soil with full sun or part shade

Propagation Propagate by seed or division in mid-spring

Suggested planting locations and garden types Banks and Slopes Flower borders and beds Architectural Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Cut back old growth in early spring to about 13cm (5in) before growth resumes

Pests Generally pest free

Diseases Leaves can be affected by rust diseases in wet summers or when planted densely

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Calamagrostis brachytricha

Korean feather reed grass

Buy from £17.99 at the RHS Plants Shop

Buy from £17.99 at the RHS Plants Shop

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