Carex chathamica

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Synonyms

Carex trifida 'Chathamica'
Carex trifida chathamica

Grass Like
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Densely tufted, clump-forming, evergreen perennial sedge, about 45cm tall, with strong stems and broad metallic blue-green leaves, silvery beneath. Produces large, terminal, brown flower spikes, during summer

Position

Full sun

Soil Types

Loam, Chalk, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Loam Chalk Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Neutral or Alkaline

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
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
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Cyperaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Clump forming, Tufted
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
Name Status
Correct
Plant Range
Chatham Islands

How to Grow

Cultivation

Suits a range of soils including well-drained and moist but well-drained soil in full sun. See ornamental grasses cultivation

Propagation

Propagate by seed in early spring or by division in mid spring to early summer

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Low Maintenance
  • Flower borders and beds

Pruning

Cut out any dead leaves on evergreen species in summer

Pests

May be susceptible to aphids

Diseases

Generally disease-free