This article aims to: (1) analyze the key characteristics and principles of two case studies that integrated PAR and agroecology in Central America; and (2) learn from the lessons offered by these case studies, as well as others from the literature,onhowtobetterintegratePARandagroecology.Keyprinciplesidentiï¬edforeffectivePAR agroecological processes include a shared interest in research by partners, a belief in collective power/action, a commitment to participation, practicing humility and establishing trust and accountability. Important lessons to consider for future work include: (1) research processes that did not start as PAR, can evolve into it; (2) farmer/stakeholder participation in setting the research agenda, from the outset, results in higher engagement and enhanced outcomes; (3) having the right partners for the desired outcomes is key; (4) intentional and explicit reflection is an essential component of PAR processes; and (5) cross-generational collaborations are crucial to long-term beneï¬ts. Key challenges that confront PAR processes include the need for time and resources over longer periods; the complexity of multi-actor process facilitation; and institutional barriers within the academy and development organizations, which prevent shifting investment towards integrated PAR agroecological processes.