Propagation
Division of the rhizome, including a growing tip during spring.

Botanic information
Leaf: The long flat mid-green linear leaves have an acute apex. The cultivar 'Rubra' turns blood-red from the tips to almost the base and is a feature of the plant.

Flower: The tiny flowers are in spikelets that are arranged in erect to arching panicle that is held above the foliage on a slender stem. They appear during midsummer.

Fruit: The small seed is not commonly seen and the plant is normally reproduced vegetatively.