Water regularly, especially during dry spells, to maintain consistently moist soil. Avoid waterlogged conditions, as this can lead to root rot. Reduce watering in cooler months when the plant's growth slows down.

Deadhead spent flower heads to prevent self-seeding and prolong blooming. In late autumn or early spring, remove dead or damaged foliage. Cut back to the ground to encourage vigorous new growth.

Propagate from seed sown in autumn or early spring. Direct sowing outdoors is often most successful. Division of established clumps can also be done in early spring.

This plant is typically grown from seed or direct sown and rarely requires repotting. If grown in a container, repot in early spring when the plant becomes root-bound, moving to a slightly larger pot with well-draining soil.