Watch video interview here. Joseph Mbura, a chemistry and math teacher at the W.B. Saul High School for Agricultural Sciences in the Roxborough section of Philadelphia has loved gardening since his boyhood days in the Kenyan countryside where crops were grown both for food and a source of income. He started a small organic garden on a section of the school’s spacious grounds to show his students that they, too, can grow their own food. He raises a traditional black bean plant for its succulent leaves which then gets steamed and mixed with onions, tomatoes and spices in a beef or chicken stew. In another plot he has just cleared he will grow “chinsaga,” another green. By Mbura’s side is his daughter Daisy who has her own garden at home and cradled in his arm, his younger daughter, Lily, who he hopes will follow the growing tradition.