Carex acutiformis, known as lesser pond sedge, is a robust UK native sedge with narrow, blue-green leaves that droop at the tips and sharply three-angled stems. In summer it carries pale brown flower spikes, followed by black seed heads.

Lesser pond sedge at a glance

Botanical name Carex acutiformis
Common name Lesser pond sedge
Plant type Clump-forming sedge with creeping roots; dies back in winter
Height and spread About 60 cm–1.5 m tall, 1–1.5 m wide
Flowers Pale brown spikes in summer, followed by black seed heads
Position Full sun or part shade; tolerates shade
Soil Wet, poorly drained clay or loam; any pH
Pond depth 0–15 cm of water, or wet mud
Hardiness RHS H7 – very hardy (below -20°C)
Native to UK (native)

Is lesser pond sedge suitable for a small pond?

No. It spreads by creeping roots, and the RHS says it is suitable only for large pond areas. In a smaller pond, keep it in a pot or basket to restrict its spread.

Where to plant it

  • The margins of large wildlife ponds, up to 15 cm deep
  • Wet clay and boggy ground
  • Natural banks, where it can spread

How to plant and care for it

Plant from spring to late summer. It is generally free of pests and diseases, though koi and ducks may graze 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.

Pond depth: 0 - 15cm

Light: Full sun or part shade

Hardiness: Hardy

Height and spread: 120cm+ tall, 100cm+ wide

Planting and flowering months are shown in the calendar under the photos.

Bare root (7 cm, 9 cm, 1 litre, 3 litre): plants sent without a pot or compost, ready to plant straight away. The most economical way to plant a group.

Potted (9 cm, 1 litre, 3 litre): plants growing in our recycled, peat-free compost made in Lincolnshire. Larger sizes give a faster display.

Pack of 3 (7 cm bare-root, 9 cm bare-root, 1 litre bare-root, 3 litre bare-root): three plants of the chosen size at a lower price per plant.

2x Pot & Compost: two plants supplied with pots and compost.

Sizes shown with a line through them are currently unavailable.

At Lincs Plants, we strive to provide fast and reliable shipping to ensure your plants arrive in perfect condition. We offer 1-3 day shipping through a variety of dispatch methods to suit your needs.

Processing Time:
Orders are processed within 1 - 3 business day after payment confirmation. Orders placed on weekends or public holidays will be processed the next business day.

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Should you have any questions or concerns about your shipment, feel free to contact us.