Dipterocarpus applanatus requires consistent moisture, especially during its establishment phase. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.

Reduce watering slightly during cooler, drier periods, but never allow the soil to dry out completely.

Pruning is typically minimal for Dipterocarpus applanatus, primarily focused on removing dead, damaged, or crossing branches. This can be done at any time of year.

Major structural pruning is rarely needed and should be performed with caution to maintain the tree's natural form.

Propagation is best achieved through seeds. Fresh seeds should be sown as soon as possible after collection in a well-draining medium. Germination can be erratic.

Vegetative propagation is challenging and not a common method for this species.

Repotting is generally not applicable to Dipterocarpus applanatus as it is a large tree species intended for landscape planting. If grown in containers, repot only when the tree becomes root-bound, which is infrequent.

Use a well-draining potting mix.