Plant in fertile, well-drained soil in full sun, giving plenty of space as this is a large perennial. Water regularly in the first year to establish a strong root system, but avoid waterlogging. Once established, it tolerates dry spells much better. Cut back to ground level in autumn after the foliage dies back.

In spring, apply a 5-7cm (2-3in) mulch of well-rotted manure or compost around the base to conserve moisture and boost growth. The plant resents disturbance, so avoid moving it once settled. Remove any faded flower stems after blooming to keep it tidy, though the dried seed heads can be left for structure if desired.