This special issue comprises articles by social and environmental scientists, most of whom participated in a working group on governance models and policy contexts of the COST Action TD1106 Urban Agriculture Europe during the period 2012–2016. All have a particular interest in the potentialities of urban agriculture as mediated through civil society actors to contribute to, shape, and transform urban policies in the intersecting fields of land use and access; food and urban ecosystems; education and environment; and history, heritage, and cultural practice. The collaborative, interdisciplinary, and bottom-up character of the contributions broadens and deepens our knowledge of urban agricultural practice across Europe.