Grow1 Heavy Duty Greenhouse Hoop HouseCommonly called hoop houses, high tunnels or cold frames, non engineered greenhouses are hands down the best bang for your buck when you're looking to install an enclosed growing space. These greenhouses feature sturdy steel frames. If you can turn a wrench, you can build one of these sturdy greenhouse structure. Whether you're a market gardener looking for valuable season extension at rock bottom pricing, or you are contemplating a range of low cost