Gmelina arborea prefers consistently moist soil but can tolerate short periods of drought once established. Water deeply when the top 2-3 cm of soil feels dry, especially during dry spells and the first year after planting. Reduce watering in cooler months.

Prune Gmelina arborea primarily to shape young trees, remove dead or damaged branches, and improve air circulation. Heavy pruning is usually not necessary. If shaping is desired, prune in late winter or early spring before new growth begins. Avoid excessive pruning.

Gmelina arborea can be propagated from seeds, cuttings, or air-layering. Seeds require pre-treatment. Cuttings, particularly semi-hardwood cuttings, generally root well under humid conditions with bottom heat. Air-layering is also a successful method.

Repotting is typically only necessary for container-grown Gmelina arborea if they become root-bound. This is best done in spring before active growth begins. Ensure the new pot provides adequate drainage and use a well-draining potting mix. For mature trees, repotting is usually not required.