ObjectivesWhile there is theoretical and empirical evidence for a positive relationship between mindfulness and pro-environmental behaviors, so far research into mindfulness-based sustainability trainings with meditation novices yielded underwhelming results. At the same time, there is a lack of qualitative research into the mindfulness and sustainability nexus. The objective of this qualitative research was to study the potential mechanisms linking mindfulness practices and individual engagement in pro-environmental behaviors in a sample of meditators.MethodsThis research is based on a reflexive thematic analysis of 13 semi-structured interviews with active meditators, analyzed under a constructivist epistemology and experiential orientation to data interpretation.ResultsFive themes describe the mindfulness-induced behavior changes experienced by the interviewees: awakening of the mind (self-regulation), awakening of the heart (relational capacities), internalizing environmental motivation, eudaimonic well-being, and deepening mindfulness. A thematic map displays the multitude of factors mediating the process of change.ConclusionsThis study revealed that for those interviewed, the degree to which mindfulness practices can encourage pro-environmental behaviors depends on the level of individual commitment towards mindfulness as a lifestyle. Particularly, the integration of mindful living principles in form of the informal practice of mindfulness plays a key role to implement behavior change. Yet even though this research identified five positive factors for change, the specific context of the interviewee sample combined with general methodological drawbacks call for a careful interpretation of the results regarding its applicability to the general population. Overall, this research provides valuable insights into the mindfulness-sustainability nexus and shows the potential of qualitative methods to research complex intra-individual change processes and long-term behavior change.