Water regularly to keep the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out slightly between waterings. Reduce watering in cooler months when growth slows down.

Overwatering can lead to root rot.

Pinch back young plants to encourage bushier growth. Deadhead spent flowers regularly to promote continuous blooming and prevent self-seeding. Light pruning can be done after flowering to maintain shape and size.

Propagate from seeds sown indoors in early spring or directly outdoors after the last frost. Cuttings can also be taken from non-flowering shoots in late spring or early summer and rooted in moist soil.

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