In the present study, Chemical Co-precipitation method was used to synthesize magnetic Iron oxide nanoparticles and applied them as fertilizer. Various sophisticated techniques were employed to confirm the surface morphology and crystalline structure of engineered nanomaterial i.e. TEM, FESEM, FTIR, XRD and BET. The growth and mitigation effects were evaluated in the Coriander plant (root, shoot and leaves) using Fe(3)O(4)NPs, NPK and without fertilizer in artificially contaminated soil with cadmium and lead solutions (20 mg/L) through ICP-OES. The mitigation percentage in coriander was found to be 97.37, 81.12, 77.79 (Cd) 98.45, 80.77, 75.89 (Pb) using 10 mg/L Fe(3)O(4)NPs, 100 mg/L NPK and without fertilizer respectively. On the other hand, growth effects were observed in length, 53.3, 33.02, 25.4 cm (Cd) 48.26, 43.18, 38.1 cm (Pb) using similar doses of Fe(3)O(4)NPs, NPK and without fertilizer respectively.Moreover, excellent antibacterial activity was being disclosed by efficient Fe(3)O(4)NPsagainst Gram positive and negative bacterium.