Carex acuta - Slender Tufted Sedge, Native Pond Marginal Plant
Carex acuta (also known as Carex gracilis), slender tufted sedge, is a tall UK native sedge with long, narrow, bluish-grey leaves and sharply three-angled stems. In late spring and summer it carries brown to blackish flower spikes. It is a different plant from lesser pond sedge, Carex acutiformis.
Slender tufted sedge at a glance
| Botanical name | Carex acuta (syn. Carex gracilis) |
|---|---|
| Common name | Slender tufted sedge |
| Plant type | Tufted sedge with creeping roots; dies back in autumn |
| Height and spread | About 90 cm–1 m tall, spreading about 1 m |
| Flowers | Brown to blackish spikes in late spring and summer |
| Position | Full sun or part shade |
| Soil | Damp to boggy, fertile soil or shallow water |
| Pond depth | 0–15 cm of water |
| Hardiness | Fully hardy (RHS Plants shop; no RHS H-rating found) |
| Native to | UK and Ireland (native) |
Is it suitable for a small pond?
It is better in larger ponds. The RHS Plants shop says it is fast-growing with an invasive tendency, and its roots creep a long way. In smaller ponds, keep it in a basket no deeper than 15 cm.
Where to plant it
- The margins of larger wildlife ponds, up to 15 cm deep
- Wet ground beside rivers and streams
- Damp, lightly shaded spots, including under waterside trees
Is it poisonous?
The RHS Plants shop lists it as toxic if eaten and as a skin and eye irritant, so wear gloves when handling it.
Which size should I buy?
Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.
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