Water consistently, especially during dry spells, ensuring the soil remains moist but not waterlogged. Reduce watering in autumn and winter as growth slows.

Good drainage is crucial to prevent root rot, so allow the top inch of soil to dry out between waterings.

Deadhead spent flowers regularly to encourage more blooms and maintain a tidy appearance. Cut back the foliage to the ground in late autumn or early spring before new growth emerges.

This removes any dead or diseased material and prepares the plant for the next growing season.

Propagate by division in early spring or autumn. Carefully lift the clumps and divide them into smaller sections, each with healthy roots and shoots. Replant divisions immediately into well-prepared soil.

This method also revitalizes older, overgrown plants.

Repot container-grown plants every 2-3 years in spring, or when they become root-bound. Use a good quality, well-draining potting mix. Choose a pot only slightly larger than the current one to avoid overwatering issues.

Ensure good drainage holes.