• 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

Carex pseudocyperus

cyperus sedge

cyperus sedge

© RHS

  • Other common names cyperus sedge
    sedge hop

  • Family Cyperaceae

  • Genus Carex can be deciduous or evergreen, rhizomatous or tufted perennials, with triangular stems bearing linear or strap-shaped leaves and short or long spikes of tiny green or brown flowers

  • Details C. pseudocyperus is deciduous, tuft-forming, slowly-spreading perennial with bright yellow-green leaves 0.5-1.2cm wide. The flowers stems are shorter than the leaves and bear decorative, bristly finger-shaped flowers in June to July

  • Plant range Temp. & sub-trop.

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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered or Exposed

Soil

  • Clay

    Clay

  • Loam

    Loam

  • MoisturePoorly-drained

  • SoilClay, Loam

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moisture-retentive soil, can be grown as marginal or bog plant in sun or light shade

Propagation Propagate by seed sown in autumn, or by division from mid-spring to early summer

Suggested planting locations and garden types Low Maintenance Wildlife Gardens

How to care

Pruning Cut back in the autumn as the foliage fades

Pests Aphids may be a problem

Diseases Generally disease free, could be affected by a rust

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