Whether you're a gardener on the side or full time, you take your gardening seriously, and that's why you're doing it right by building your greenhouse on the Rion Hobby/Grand Gardener Greenhouse Base Kit. A strong base is a good base, and this base is the best. This snap-together unit is made from heavy-duty, 100% UV-protected resin that's engineered with a honeycomb design for added strength and durability. This material won't crack when it freezes or rot when it rains, making it ideal for an outdoor structure. Once you've got it in place, fill the base with soil for added weight, and now you've got something that's ready to withstand those windy days. It's designed for use with Rion Greenhouses, and when it's all said and done, it also adds an additional 5 inches of headspace, which means more room for you and your plants.