Water consistently during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering significantly in winter, providing just enough to prevent complete desiccation.

Ensure good drainage to avoid root rot, especially in containers.

Prune back dead or damaged stems in early spring before new growth appears. Deadheading spent flowers can encourage a tidier appearance and potentially a second bloom.

Minimal pruning is usually required to maintain shape.

Propagate by division of clumps in early spring or autumn. Carefully separate the rhizomes, ensuring each division has roots and at least one growth bud. Replant immediately into well-draining soil.

Repot container-grown plants every 2-3 years in spring. Choose a pot only slightly larger than the current one and use a well-draining potting mix.

This helps to refresh the soil and provide adequate space for root growth.