Propagation
Sow fresh seeds in situ during spring in a prepared bed with frost protection or sow seed when ripe and place in a cold frame to germinate. 

Division of the clump during late spring to early summer.

Botanic information
Leaf: The arching bright green linear leaves are double channelled with a dull grey-brown basil sheath. The margin is minutely serrated and sharply scabrid and at the base shreds into fibres that wrap around the culms. 

Flower: There are 10, 15 or 24 pendant spikes on slender peduncles with the upper ones becoming smaller and are male. The female spikes are male at the top. The female flower is enclosed in a bladder-like perigynium consisting of 1-style and 2 or 3 stigmas. The red-brown broadly ovate glumes have a short awn. They appear from late spring to early summer.

Fruit: The tiny dull brown ovoid to orbicular 3-angled nut is surrounded by a persistent perigynium. The small seeds are viable but the plant is commonly reproduced vegetatively.