Keep soil consistently moist during the growing season, but not waterlogged. Reduce watering significantly as foliage begins to yellow and die back in autumn, allowing the rhizomes to dry out slightly during dormancy.

Ensure good drainage to prevent root rot.

Remove spent flower stalks at the base as they fade to encourage further blooming and prevent seed formation. Cut back all yellowing or dead foliage once the plant enters dormancy in autumn.

This helps maintain plant health and prevents disease.

Propagate by dividing rhizomes in spring just as new growth appears. Ensure each division has at least one eye or growing point. Replant divisions in well-draining soil at a depth of about 5-10 cm.

Repot established plants every 2-3 years in spring before growth begins. Choose a pot only slightly larger than the previous one, using a well-draining potting mix.

This prevents the soil from becoming compacted and allows for fresh nutrients.