Heavy metal pollution resulting from anthropogenic activities poses significant environmental challenges, necessitating effective remediation strategies. This study investigates the phytoremediation potential of C. roseus, a medicinal plant, for cadmium (Cd) and zinc (Zn) contamination, with the application of sugarcane bagasse biochar amendment. Pot experiments included soil preparation, cultivation, and sample analysis to evaluate the impact of biochar on plant growth, metal accumulation and remediation efficiency. Results indicate that biochar amendment enhances root biomass production, reduces metal translocation from roots to shoots, and increases metal uptake by the plant. Spearman correlation analysis reveals a strong relationship between amendment rates, plant growth characteristics, and remediation indices, highlighting the efficacy of biochar in improving phytoremediation efficiency. The study concludes that C. roseus, augmented with biochar, demonstrates a promising phytoremediation strategy for Cd and Zn contamination. These findings emphasise the potential of biochar-assisted phytoremediation as a sustainable approach for mitigating heavy metal pollution in contaminated soils.