Grow Free, a grassroots social initiative, emerged in South Australia in 2013. Grow Free advocates for the sharing and exchange of free seeds, seedlings, fruits, and vegetables among neighbors. The number of Grow Free participants grew to about 230 throughout South Australia as of 2022. This article explores the agri-social characteristics of Grow Free participants, drawing on 50 postal survey respondents and 17 semi-structured phone interviews. This study finds that diverse non-governmental organizations in addition to residential households are actively participating in the Grow Free network, including community gardens and community centers. Moreover, many household-type Grow Free participants are linked to an array of other grassroots social initiatives including Permaculture South Australia and Trees for Life. The study notes that Grow Free along with other alternative food networks has facilitated collaborative food production and consumption at a local scale. Through grassroots organizational mechanisms, Grow Free participants have been committed to fostering community building and resilience through food sharing.