Water regularly, allowing the top 5-7 cm of soil to dry out between waterings. Reduce watering during winter months. Ensure good drainage to prevent waterlogged roots, which Alstonia actinophylla is sensitive to.

Overwatering can lead to root rot.

Prune to shape and maintain desired size. Remove any dead, damaged, or crossing branches.

Light pruning can be done at any time, but heavier pruning is best performed in late winter or early spring before new growth begins. Use clean, sharp tools.

Propagation is typically done from semi-hardwood cuttings taken in late summer or early autumn. Dip cuttings in rooting hormone and plant in a well-draining propagation mix.

Maintain high humidity and warmth until roots form.

Repot young plants annually or every two years in spring, moving to a slightly larger pot. Mature plants can be repotted less frequently. Use a well-draining potting mix.

Ensure the new pot has adequate drainage holes to prevent water accumulation.