ABSTRACT Diversification is key for agroecological transformations, but little is known about how it relates to farmers’ dietary diversity and food sovereignty. Our team and coffee cooperative staff conducted a participatory action research mixed methods study, including 171 surveys and 50 interviews. Over 70% of the farmers reported self-initiated diversification activities. Statistical analysis showed a significant positive correlation between crop diversity and dietary diversity, while controlling for farm size and income. To assess gender relations females responded to 41% of the surveys, and we separated focus groups by sex. Average male-owned farms were 1.8 ha larger than women-owned farms, yet we found no significant differences in household food security or dietary diversity. Additional disparities included male vs. female perceptions about who does additional diversification work and who decides about strategies. Although the co-op has a strong gender equity and technical assistance program, our analysis of extension training documents identified useful content and a smaller percent of female participants in diversification vs. gender sessions. Suggested strategic actions for co-op planning include supporting: (1) female land ownership, (2) diversification focused farmer-led experimentation, and (3) more training for men on gender, women on diversification, and all participants in feminist agroecology.