About
Carex nigra 'On-line' is a clump-forming, evergreen sedge that gradually spreads, reaching a height of approximately 45 cm. It features creeping mounds of grey-green leaves with narrow creamy-yellow margins. In early to late summer, it produces flower spikes that are purplish-black in color.
About the genus
Carex encompasses both deciduous and evergreen species, characterized by their rhizomatous or tufted growth habits. These perennials feature triangular stems topped with linear or strap-like foliage, and they produce spikes that can be either short or elongated, adorned with small green or brown flowers.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Clay, Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Poorly-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Grass Like
- Habit
- Clump forming, Tufted
- Foliage
- Evergreen
- Height
- 0.1-0.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Coastal, Cottage and informal garden
Care notes
- 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
- Pruning
- Cut out any dead leaves on evergreen species in summer
- Propagation
- Propagate by division in mid spring to early summer
- Pest resistance
- May be susceptible to aphids
- Disease resistance
- Generally disease-free