Removal of heavy metals was enhanced when P. australis and T. latifolia were grown in combination than when grown alone, while, P. australis performed better than T. latifoliain monoculture. Rhizosphere of these plants provided the substrate and supporting media for the growth of microorganisms, which are the main sites of the heavy metals immobilization and uptake by plants. When grown in combination the rhizosphere of these plants was increased, which would further augment the cell wall capability to absorb metals through immobilization.