The identification of individual and institutional drivers regarding ecological transition of individual behaviors has been widely studied in the literature. However, few studies report the specific case of private gardening practices, even though it is particularly relevant when discussing lifestyle habits and ecological transition, due to the wide range of positive and negative environmental externalities private gardens may generate. Using a European database (Eurobarometer 83.4), we estimate individual and institutional drivers of sustainable gardening practices. Our econometric approach takes the specificities of our data into account, by using a two-step approach combining a generalized Heckman model and a meta-regression, and allows us to highlight the importance of the accessibility to biodiversity-related information in the adoption of environmentally friendly behaviors. Differentiated trends between European countries are tested using indicators on economic development, social capital and environmental performances. In conclusion, we provide some recommendations in terms of public policies.