Water moderately, allowing the soil to dry out slightly between waterings. Ensure good drainage to prevent root rot, especially during cooler months. Reduce watering in winter dormancy.

Deadhead spent flowers to encourage reblooming and maintain a tidy appearance. In late autumn or early spring, cut back dead foliage to the ground to promote new growth and prevent disease.

Divide established clumps in early spring or autumn. Seeds can be sown outdoors in autumn or stratified indoors and sown in spring. Take stem cuttings in summer.

Repot container-grown plants every 2-3 years in spring. Use a well-draining potting mix. Choose a pot one size larger than the current one to accommodate root growth.