Farm to preschool connects early care and education settings to local food and/or food producers with the objectives of serving locally grown, healthy foods to young children, improving child nutrition, and providing related educational opportunities. This study systematically reviewed the farm to preschool research literature from 1994 to 2015 and described findings from the 2012 National Farm to Preschool Survey. A wide range of activities was represented in the 14 studies reviewed; most employed participatory research collaborations, assessed process outcomes, and used uncontrolled research designs. Survey findings indicated that programs operate in at least 39 states and Puerto Rico, in many types of communities and settings. Respondents identified types of foods and activities, motivations for participation, and parent engagement. There is still much to be learned about farm to preschool programs, and well-controlled research is necessary. (author abstract)