Water regularly during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering in winter to prevent waterlogging. Ensure good drainage to avoid root rot, especially in containers.

Adapt watering based on local climate conditions.

Prune to remove dead, damaged, or spent flower stalks. Light pruning can be done anytime to maintain shape. For a tidier appearance, cut back the foliage in late winter or early spring before new growth emerges.

This encourages vigorous new shoots.

Propagate by division of clumps in spring or autumn. Carefully separate the rhizomes, ensuring each division has roots and at least one shoot.

Alternatively, sow fresh seeds in autumn or spring, but germination can be slow and erratic.

Repot container-grown plants every 2-3 years, or when they become root-bound. Choose a pot that is slightly larger than the previous one. Use a well-draining potting mix, typically a blend of loam, sand, and compost.