In Thailand it sometimes occurs growing gregariously with D. obtusifolious, D. tuberculatus, Shorea robusta and S. siamensis, sometimes in pure stands forming the climatic dry deciduous dipterocarp forest.

[3] This forest type covered a large area of eastern, north-eastern and northern Thailand, from peneplain at 150-300m elevations to slope and ridges up to 1300m above sea level.

[4] The tree prefers poor, sandy and lateritic soils derived from granitic and sandstone formations.

[3] Seedlings develop hardy rootstock and thick rough bark on the stout stem, affording fire-protection in the ground-fire prone early hot dry season.

In Thailand leaves are shed from November, defoliation is complete by February, with leaf starting at this time, or sometimes a little before.