Above: Just planted. In a year, the grasses and sedums will grow together to create a dense carpet. Image by Michael Graydon.
Above: On Long Island, a 1,000-square-foot green roof is being planted with native species—including Blue Eyed Grass, Green and Gold, Creeping Phlox, and Wavy Haired Grass—along with sedums and other grasses such as Blue Fescue. Image via Marni Majorelle.
How do you install a green roof on a typical Brooklyn townhouse? Glad you asked: see How to Make the Most of Your Urban Garden: (Hint: Use the Roof Too).