Four plantation species. Acacia crassicarpa, Acacia auriculiformis, Gmelina arborea (yemane) and Azadirachta excelsa (sentang)) were tested for their natural resistance towards a white rot fungus (Pycnoporous sanguineus) and for their durability after three months' exposure to the ground. Hevea brasiliensis (rubberwood) and Neobalanocarpus heimii (cengal) were used as controls. Samples were prepared from the heartwood portion. The weight loss of the timbers caused by the white rot fungus and their durability in ground contact were evaluated in accordance with ASTM Standards. The weight loss values for the outer heartwood of the plantation timbers ranged from 7.69 to 14.69% while those for the inner heartwood ranged from 13.16 to 24.20%. On average, all the plantation timbers fell in the class of resistant against white rot fungus. Within the class, G. arborea had the highest average weight loss value (19.88%), followed by A. crassicarpa (19.53%), A. excels (15.44%) and A. auriculiformis (10.75%). H. brasiliensis and N. heimii had weight loss values of 61.20% and 2.16%, respectively. After three months of exposure in the ground, A. auriculiformis was the most durable against decay fungi whilst A. excelsa was the most durable against termite attack. The least durable against decay and termite attack were A. crassicarpa and G. arborea, respectively.