Carex acutiformis

RHS Plant Profile
lesser pond sedge

Other common names

marsh sedge, swamp sedge, lesser bank sedge, sniddel, sniddels, hesgen ganolig-dywysennog

Synonyms

Carex paludosa

Grass Like Aquatic Bogs

A robust, clump-forming, perennial native sedge of ponds, streams and boggy areas, spreading to form very dense clumps of pale, greyish-green foliage about 1.2m tall. Produces tall, fluffy, pale brown flower spikes in summer, followed by black seed heads

Position

Full sun, Partial shade

Soil Types

Clay, Loam

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1-1.5 metres
Max Height
1-1.5 metres

Growing Conditions

Clay Loam
Moisture
Poorly–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Cyperaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
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
E Europe

How to Grow

Cultivation

Grow in any waterside location, boggy or wet soils in sun or part shade. Robust, spreading plant only suited to large pond areas. See bog gardening and pond plants for further advice

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
  • Wildlife gardens

Pruning

No pruning required, tidy if possible after foliage begins to die down

Pests

Generally pest-free

Diseases

Generally disease-free