General description: A. Used highway guard rails form the outside edge of the general foundation of the greenhouse. Railway ties will also work. B. Cement blocks create the walkway outside of the grow box. C. Blueboard Styrofoam insulation is used outside of cement block liners, the same cement blocks that are used for the walkway. These line the inner suface of the grow box embedded into the ground halfway. D. 2"x3" Wood framing, similar to house construction creates the basic structure. E. This unit is attached to the south wall of house, thereby eliminating the problem of the cold north wall, a major problem in stand-alone greenhouses. This rendering became the blueprint and guide for the construction you see on the following pages.