Keep the soil consistently moist but not waterlogged. Water thoroughly when the top 2-3 cm of soil feels dry. Reduce watering in winter to prevent root rot, especially if grown in cooler conditions.

Ensure good drainage to avoid standing water, which can harm the roots.

Deadhead spent flowers regularly to encourage more blooms and maintain a tidy appearance. After flowering, cut back the stems by about one-third to promote bushier growth and to prevent self-seeding if unwanted.

Remove any dead or damaged foliage at any time.

Propagate by division of clumps in early spring or autumn. Carefully dig up the plant and separate the root ball into smaller sections, ensuring each section has healthy roots and shoots.

Replant the divisions immediately into well-draining soil.

Repot every 2-3 years in spring before new growth begins. Choose a pot that is slightly larger than the current one, with ample drainage holes. Use a good quality, well-draining potting mix.

Water gently after repotting and place in a shaded spot for a few days.