Water regularly, especially during dry periods, but ensure well-draining soil to prevent waterlogging. Allow the top few centimeters of soil to dry out between waterings.

Reduce watering in winter when the plant is less active. Overwatering can lead to root rot.

Prune after flowering to remove spent flower stalks and tidy the plant. Deadheading encourages a tidier appearance and can sometimes promote a second, albeit smaller, flush of blooms.

Minimal pruning is generally required; focus on removing any dead or damaged foliage.

Propagate by division in early spring or autumn. Carefully divide established clumps, ensuring each section has sufficient roots and shoots. Alternatively, sow seeds in autumn or early spring in a cold frame.

Germination can be slow and erratic.

Repot young plants annually or every two years in spring. Established plants are generally best left undisturbed. Use a gritty, well-draining compost.

Repotting is primarily for dividing overgrown clumps or refreshing soil for younger specimens.