Water moderately during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in autumn and keep the soil barely moist during winter dormancy to prevent root rot.

Ensure good drainage to avoid waterlogging, which is detrimental to this plant.

Prune lightly after flowering to maintain shape and remove spent blooms. Deadhead spent flowers to encourage further blooming and prevent seed formation.

Hard pruning is generally not required, but you can trim back any leggy or overgrown stems in early spring before new growth begins.

Propagate from seed sown in spring or from cuttings taken in late spring or early summer. Seeds require stratification; sow in a well-drained compost and keep moist.

Cuttings should be rooted in a sandy, well-drained medium in a propagator or under cover.

Repot young plants annually in spring as needed, typically every two years. Mature plants can be repotted less frequently, perhaps every three to four years. Use a well-draining, slightly acidic compost mix.

Choose a pot that is only slightly larger than the current root ball.