Water regularly to keep the soil consistently moist, especially during dry periods. Avoid waterlogging, as this plant prefers well-drained conditions. Reduce watering in winter when the plant is dormant.

Check the soil moisture with your finger before watering.

Deadhead spent flowers to encourage reblooming and prevent self-seeding. In late autumn or early spring, cut back the plant to the ground to remove dead or dying foliage and encourage vigorous new growth.

This also helps maintain a tidy appearance.

Propagate by division in early spring or autumn. Sow seeds in autumn or early spring in a cold frame or unheated greenhouse. This species can also spread readily by seed, often self-seeding in suitable conditions.

Repotting is rarely necessary for this species, as it is often grown as a perennial border plant or in naturalized areas. If grown in a container and it becomes root-bound, repot in spring into a slightly larger pot with fresh, well-draining potting mix.