Potential of Chromolaena odorata plants for remediation of Cs-137 from solutions and low level nuclear waste was evaluated. When plants were exposed to solutions spiked with three different levels of Cs-137, namely 1 x 10(3) kBq L-1, 5 x 10(3) kBq L-1 and 10 x 10(3) kBq L-1, 89%, 81% and 51% of (CS)-C-137 was found to be remediated in 15 d, respectively. At the lowest CS activity (1 x 10(3) kBq L-1), accumulation of Cs was found to be higher in roots compared to shoots, while at higher Cs activities (5 x 10(3) kBq L-1 and 10 x 10(3) kBq L-1), Cs accumulation was more in shoots than roots. When plants were incubated in low level nuclear waste, 79% of the activity was removed by plants at the end of 15 d. The present study suggests that C. odorata could be used as a potential candidate plant for phytoremediation of (CS)-C-137. (C) 2008 Elsevier B.V. All rights reserved.