African policymakers need to act now to steer urbanization from its current, unsustainable path toward healthy, greener cities that ensure food and nutrition security, decent work and income, and a clean environment for all their citizens. This report highlights a key component of sustainable urban development: urban and peri-urban horticulture (UPH). Based on an Africa-wide survey and on case studies prepared by national experts, the report reviews the current state of UPH in countries across the continent, from Algeria to Zambia, and in cities from Nairobi to Dakar. It presents major findings, detailed profiles of urban and peri-urban horticulture in 22 countries, and recommendations for the development of market gardens to serve Africa's rapidly growing urban population and healthy, greener cities.