The present research attempts to understand the young consumers' intention toward buying green products in a developing nation; India. The study has used the Theory of Planned Behavior (TPB) as its theoretical framework and further attempted to extend the TPB by incorporating additional constructs (environmental concern & environmental knowledge) in it. Data was collected using self-administered questionnaire survey and analyzed with the help of structural equation modeling (SEM). The finding reported the usefulness of TPB in predicting young consumers' intention towards purchasing green products. The result also supported the applicability of including additional constructs in TPB, as it has improved the predictive utility of the proposed model (from 27.1% to 37.7%). At the end, the implications for policy makers and scope for further research have been discussed. •Findings supported the applicability of TPB in predicting green purchase intention.•Additional constructs (environmental concern & knowledge) were included in TPB.•The study supported the inclusion of additional construct in the TPB.•Additional constructs improved the predictive power of the theoretical framework.•Environmental concern emerged as the most significant predictor of green purchase intention.