Water regularly during the growing season, allowing the soil to dry slightly between waterings. Reduce watering significantly in winter, providing only enough to keep the roots from drying out completely.

Avoid waterlogged conditions, which can lead to root rot.

Prune after flowering to maintain a neat appearance and prevent excessive self-seeding. Remove spent flower stalks and any leggy or damaged stems. Light trimming can encourage a denser habit.

Avoid heavy pruning, as it can stress the plant.

Propagate by division in early spring or fall. Carefully divide established clumps, ensuring each section has roots and shoots. Alternatively, sow fresh seeds in autumn or spring in a cool greenhouse.

Cuttings can also be taken in late spring.

Repot young plants annually in spring. Mature plants can be repotted every 2-3 years or when they become root-bound. Use a well-draining potting mix.

Ensure the new pot provides adequate space for root growth without being excessively large.