Purpose: Knowledge exchange networks are critical to farmer success and help reduce barriers to entry and growth for new farmers. This study explores informal and formal knowledge exchange networks among two growing industries in Maine: maple syrup production and beekeeping. We increase understanding of the mechanisms through which knowledge exchange occurs by applying adult learning theory. Design/Methodology/Approach: We conducted 46 semi-structured interviews with small- and medium-sized maple syrup producers and beekeepers in Maine. Findings: Maple producers and beekeepers relied on both informal and formal knowledge exchange facilitated by producer associations where the following adult learning theory principles flourished: (1) orientation to learning, (2) prior experience of the learner, and (3) self-concept of the learner. These maple producers and beekeepers also found great value in the community and friendships created through these networks fostering greater expansion within each industry. Practical Implications: Agricultural extension should institute instructional design that features demonstrations, experiential learning, and sharing of fellow producer experiences to help bolster adult learning theory principles. Theoretical Implications: Adult learning theory provides a useful framework in which to explore learning and knowledge exchange among distinct agricultural production practices to help inform future education and training initiatives. Originality/Value: This study is the first to comparatively and specifically examine knowledge exchange among maple producers and beekeepers with application of adult learning theory. This study provides a framework in which to evaluate knowledge exchange among other farming enterprises within an agricultural context to identify effective, meaningful learning mechanisms.