The basic structure and the outline of the greenhouse can be made out of aluminum, galvanized steel, wood, or plastic. We commonly use dirt to build the floor because it doesn’t retain heat, so that it doesn’t affect your plants. For the cover, we can use glass, fiberglass, double-sheet polyethylene, polyvinyl chloride, and polycarbonate, because these materials can help to let the light go in , in order to let the plants absorb more light. You can also add solar panels on top if you need any electricity for your greenhouse.