Dillenia alata prefers consistently moist soil, especially when young. Water thoroughly when the top 2-3 cm of soil feels dry. Reduce watering slightly in cooler months but avoid letting the soil become completely dry.

Good drainage is crucial to prevent root rot.

Prune to shape the tree and remove any dead, damaged, or crossing branches. Light pruning can be done after flowering to maintain size and form. Avoid heavy pruning, as it can reduce flowering.

Use clean, sharp tools for all pruning cuts.

Dillenia alata can be propagated from seeds, which require scarification and stratification before sowing. Stem cuttings can also be taken from semi-hardwood in summer and treated with rooting hormone.

Keep cuttings moist and in a warm, humid environment.

Young plants may benefit from repotting every 1-2 years in spring. Choose a pot only slightly larger than the current one. Use a well-draining potting mix, such as a blend of peat, sand, and loam.

Mature plants rarely need repotting.