A new greenhouse and an educational pavilion transform the rooftop of Collège Flora Tristan into a productive and pedagogical urban farm. Located atop a secondary school in Paris, the project supports the work of Veni Verdi, an urban agriculture association that cultivates fruits, vegetables, and flowers as part of the school's educational program. The rooftop, originally intended as a school playground, already offered spatial qualities compatible with productive use. Through a participatory budget from the City of Paris, the project enhances this unique agricultural setting while embracing a frugal approach aligned with environmental and financial constraints.