A rooftop garden can prolong the roof's life, control storm-water runoff, and even save energy because it stabilizes temperature. To successfully grow vegetables, flowers, herbs, and even shrubs, only 6+ inches of growing medium are needed. Available from FarmTek are various sizes (or quantities) of the following Rooftop Garden System Components--aluminum edging, edging extensions, steel inspection boxes, aluminum corner connectors, drainage plates, filter fabric, protection mats, and a growing medium specially formulated for rooftop use.