• 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 grayi

mace sedge

mace sedge

© RHS

  • Other common names mace sedge

  • 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. grayi is a deciduous, grass-like, tufted perennial forming strong, erect clumps of rich green leaves to 60cm long. Mid-green flower spikes on 60cm stems appear all summer, followed by spiky, pale green seedheads

  • Plant range E N America

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 0.5-1 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 a 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 Cut Flowers Flower borders and beds Wildlife Gardens Cottage & Informal Garden

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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