Water regularly, keeping the soil consistently moist but not waterlogged. During hot, dry periods, increase watering frequency.

Aim to water at the base of the plant to prevent fungal diseases on the foliage, especially in humid conditions.

Deadhead spent flowers to encourage continuous blooming and prevent self-seeding. In late fall or early spring, cut back the dead foliage to the ground to promote new growth and improve air circulation.

Divide established clumps in early spring or fall. Cuttings can be taken from softwood in late spring or semi-hardwood in mid-summer. Sow seeds outdoors in fall or indoors in early spring, keeping them moist.

Perennial varieties typically do not require frequent repotting. If grown in containers, repot every 2-3 years in spring or fall into a slightly larger pot with fresh, well-draining potting mix. Ensure adequate drainage.