Water regularly during the growing season, especially when young plants are establishing. Allow the soil to dry slightly between waterings. Reduce watering in late fall and winter.

Avoid waterlogged conditions, which can lead to root rot.

Cut back the spent flower stems in late fall or early spring to maintain a tidy appearance and prevent self-seeding if undesired. You can also deadhead spent blooms during the growing season to encourage further flowering and improve aesthetics.

Propagate by division in early spring, separating clumps into smaller sections with roots and at least one growing point. Seeds can be sown in fall or stratified indoors and sown in spring.

Cuttings can be taken from young shoots in late spring or early summer.

Repot container-grown plants every 2-3 years in early spring to refresh the soil and provide more space. Choose a pot with good drainage.

For established garden plants, division serves as a form of renewal and avoids the need for frequent repotting.