Motivated by the growing worldwide concern for sustainable development, in this study, we explore the antecedents of green consumerism in an economy driven by environmental sustainability concerns. Drawing on a survey of 705 Slovenian consumers, we find that consumers' environmental commitment, perception of eco‐products, and perception of barriers to be green all positively affect the green purchase intention, which in turn positively and significantly affects consumers' purchase of eco‐products. The findings further show that consumers' environmental commitment and perception of eco‐products are the strongest determinants of the green purchase intention. In addition, consumers' demographics determine their perceptions of eco‐products, environmental commitment, and green purchase intention. Implications for marketing practice are provided.