Mecardonia grandiflora prefers consistently moist soil but dislikes waterlogged conditions. Water thoroughly when the top 2-3 cm of soil feels dry.

Reduce watering slightly in cooler months, but never allow the soil to dry out completely. Ensure good drainage to prevent root rot.

Prune Mecardonia grandiflora to maintain shape and encourage bushier growth. Pinch back the tips of stems regularly, especially in spring and early summer. Remove spent flowers to promote continuous blooming.

Harder pruning can be done in late winter or early spring before new growth begins.

Mecardonia grandiflora can be propagated by softwood cuttings taken in spring or summer. Root cuttings in moist, well-draining potting mix, ideally with bottom heat.

Seeds can also be sown in spring, but germination may be erratic and slow. Cuttings generally establish faster and reliably.

Repot Mecardonia grandiflora every 1-2 years, or when the plant becomes root-bound. Spring is the ideal time for repotting, just as new growth appears. Use a good quality, free-draining potting mix.

Choose a pot that is only slightly larger than the current one to avoid overwatering issues.