ObjectiveThe study addresses two research inquiries: evaluating the effectiveness of the Home Garden Network (HGN) program in attaining its four intended outcomes (learning, growing, sharing, and healing) as well as exploring the social capital mechanisms in facilitating the four outcomes.BackgroundDrawing from Coleman's social capital theory, the HGN program was developed in response to common issues many families experience: the lack of family leisure time, dietary‐related health issues, and food insecurity.MethodsIndividual interviews were conducted with eight program participants.ResultsThe findings revealed that the program produced the four intended outcomes in which the three forms of social capital (i.e., information channels, reciprocity, and social norms) served as mechanisms that explained the outcomes. Through information channels, participants learned from their network members as well as the program facilitators. Reciprocity is fostered through a system where families take turns assisting each other in growing their gardens, establishing a sense of mutual obligation. Social norms encourage the sharing of produce and plants, reinforcing a collective culture of generosity. Reciprocal relationships further strengthened their interpersonal bonding experiences, providing participants with a sense of group identity and belonging, and hence healing. In addition, families utilize their gardens as a communication starter, establishing social norms of routines and responsibilities that promote family cohesion.ConclusionThe study validates the HGN program in achieving its learning, growing, sharing, and healing objectives.ImplicationsThe program offers implementation opportunities for human services organizations and land‐grant universities, aligning with social policies promoting food security and healthy lifestyles.