Patent ID: 8479443

Claim:
A module for covering a portion of a surface with vegetation, comprising: (a) tray for containing a growing medium and vegetation, the tray having a biodegradable bottom and a plurality of upwardly extending biodegradable walls about the perimeter of the biodegradable bottom, the biodegradable bottom configured so that water received within the tray can pass therethrough; (b) a permeable membrane provided below the biodegradable bottom, the permeable membrane sized and shaped so as to span the biodegradable bottom and configured to allow water to pass therethrough while inhibiting the growing medium from passing therethrough; and (c) a drainage board provided below the permeable membrane opposite the biodegradable bottom, the drainage board having an upper surface for supporting the biodegradable bottom and being surrounded by a plurality of edges, the drainage board configured so that at least some of the water passing through the permeable membrane and received on the drainage board will be drained away from the tray.