In recent years, urban horticulture (UH) has been increasingly deemed as asustainable practice that addresses various urban challenges. Research andimplementation of UH around the globe have demonstrated that it can fulfill multiplefunctions and produce a range of market- and non-market-goods and services thatmay have positive impacts on the urban setting in all three sustainability dimensions(social, economic and environmental). One major social advantage lies in improvingfood security for either individuals or entire communities.Food security (as defined by the FAO) is based on four pillars: availability(quantity and quality), accessibility, utilization, and stability. Building resilience forfood security is particularly relevant in times of crisis (such as in the face of the Covid-19 pandemic). The real impact of UH in supporting sustainable food security willdepend on the scale on which it can be applied in cities of the future.In this symposium, our aim was to bring urban food production and foodprovision into the focus of investigation. Contributions deal with different types of UH(community-oriented projects, commercial farms, gardening, etc.) in intra-urbancontexts but also within the broader city-region food system (e.g., peri-urbanhorticulture). The papers compiled in this book, address the multidimensionalbenefits and risks of UH on different sustainability dimensions (environmental,economic, social) as well as related challenges and innovations at the production,market, education and policy level. The two final sessions of this symposium wereshared with the II International Symposium on Greener Cities: Improving EcosystemServices in a Climate-Changing World (GreenCities2022) and focus more specificallyon the role that UH and green urban infrastructures can play on human health andwell-being.