<b>Chromium induced growth inhibition and alteration of biochemical parameters in Ocimum basilicum L.</b> The hydroponically grown plants of Ocimum basilicum L. were exposed to varying levels of K2Cr2O7 0, 5, 10, 25 ┬ÁM . The plants were tested for various morphological and biochemical parameters on 3rd and 5th day after treatment. Chromium Cr resulted in reduction of plant length and biomass. The deleterious effects of the hexavalent chromium on O. basilicum were further confirmed by the reductions in chlorophyll a and b contents, soluble protein and while as the free amino acid and proline contents were increased. The study concludes that chromium causes stress in the Ocimum basilicum plants and thus alters various morphological and biochemical parameters. 45-53 Issue-2 Volume-2 Ruqaya Jabeen