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

Ensure good drainage to prevent excess moisture accumulation around the roots.

Prune to control its vigorous growth and shape. Cut back overgrown stems in late winter or early spring to encourage new, bushier growth. Remove dead or damaged stems at any time.

Promptly deadhead spent flowers to prevent unwanted spreading and encourage further blooms.

Propagates easily from stem cuttings taken in spring or summer. Root cuttings in moist, well-draining potting mix.

It also readily self-seeds, so allow plants to naturalize if desired, or collect seeds to sow in pots or directly in the ground in spring.

Repot container-grown plants every 2-3 years in spring, or when they become root-bound. Use a larger pot with fresh, well-draining potting soil.

This plant generally prefers to be slightly root-bound, so over-potting can sometimes lead to reduced flowering.