Saul Nurseries in Atlanta and Alpharetta, Georgia, have supplied thousands of plants for area greenroofs, both extensive and intensive, including the Atlanta City Hall. The owners wanted to install a small test greenroof to trial appropriate plants for the hot, humid climate. In August 2003 an existing small 8 x 6.5' shade shelter was reinforced to hold the load of the 4" growing substrate. The substrate consists of ItSaul Natural products including the Mr. Natural Liteweight Soil Mix, Hen…