The Gardman R687 4-Tier Mini Greenhouse is ideal for small backyards, decks, courtyards, and balconies, to provide protection from weather conditions. The Greenhouse is a perfect foundation for your seedlings and young plants to thrive, shielding the vegetation and therefore extending the plant growing season. The Gardman greenhouse is lightweight, yet sturdy, made of high quality solid powder-coated tubular steel and a heavy-duty clear polyethylene cover that will last seasons. The roll-up zippered door provides easy access with humidity control by simply opening/closing the zippered front flap. The assembly instructions are easy to follow and require no tools. The Greenhouse includes four 18" deep shelves with simple push-fit assembly, guy ropes, and metal stakes for extra stability against wind. For additional security, a zip tie can be attached from the frame to the shelves and there are tabs on the back to fasten it to a wall or patio railing. Enrich your Greenhouse by adding a combination of grow lights, thermometer/hygrometer, heating mats, fans, etc.