Water regularly during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering in autumn and keep the soil mostly dry during winter dormancy.

Avoid waterlogging, which can lead to root rot. Consistent moisture is key for healthy development.

Prune back dead or damaged stems in late winter or early spring before new growth emerges. Deadheading spent flower stalks can prevent self-seeding if desired.

Minimal pruning is generally required; focus on maintaining a tidy appearance and removing any signs of disease.

Propagate by seed sown in autumn or early spring. Stratification may improve germination rates. Division of established clumps in spring or autumn is also an effective method.

Ensure divisions have healthy roots and at least one viable shoot.

Repot young plants annually or as needed, typically in spring, to provide fresh soil and adequate space for root growth. Mature plants generally prefer to be left undisturbed.

Use a well-draining potting mix in a pot only slightly larger than the current root ball.