Carex nigra 'On-line' (v)

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sedge 'On-line'

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Synonyms

Carex nigra 'Variegata'
Carex nigra variegated

Grass Like

Slowly spreading, clump-forming, evergreen perennial sedge, about 45cm tall, producing creeping mounds of grey-green foliage narrowly margined creamy-yellow. Bears purplish-black flower spikes, early to late summer

Position

Full sun

Soil Types

Clay, Loam

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

Clay Loam
Moisture
Moist but well–drained or Poorly–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing or East–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)
H7

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
Accepted

How to Grow

Cultivation

Grow in fertile moist but well-drained soil, boggy soil or by water, best in full sun. Suitable as ground cover, especially in wet areas and coastal situations See ornamental grasses cultivation

Propagation

Propagate by division in mid spring to early summer

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Low Maintenance
  • Ground cover

Pruning

Cut out any dead leaves on evergreen species in summer

Pests

May be susceptible to aphids

Diseases

Generally disease-free