Herbaceous Perennial
Propagate by basal softwood cuttings from overwintered stools in late winter or early spring. Cuttings should be rooted in a loamless compost the surface of which is covered with dry sand and kept in a temperature of 16°C. Place in a cold frame after first rooting and protect from frost. Harden off in mid spring. Established clumps may be propagated by division in spring.
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