Phytoremediation potential of Moringa oleifera and Moringa stenopetala on polluted lands of east and west of Bamangwato Concessions Limited Cu/Ni mine smelter, Selebi-Phikwe, Botswana was evaluated. Plants were raised in greenhouse (pots) in soils collected 2.5 km east, 2.5 km west, 20 km west, and 55 km west (control) of the mine smelter, which were supplemented with and without coal fly ash. Without ash, both species did not survive in soils collected 2.5 and 20 km west. In soils from 2.5 km east, soil acidity and heavy metal stress reduced vegetative growth and total dry weight. Both species accumulated more metals in roots than in shoots, and failed to hyperaccumulate any metal. In soils collected 2.5 and 20 km west, coal fly ash enabled plants to survive, reduced accumulation of majority of heavy metals and increased vegetative growth and total dry weight. Heavy metal accumulation, translocation and bioaccumulation factors of plants grown in soils with ash generally followed the order 55 km west> 2.5 km east> 20 km west> 2.5 km west. Moringa oleifera and Moringa stenopetala are not good candidates for phytoextraction of heavy metals east and west of mine smelter, but have a potential for phytostabilisation with the help of coal fly ash.

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