Welcome to the Forum: What is your main goal in your posting? Are you trying to save money on purchasing glass/plastic for an underground greenhouse rather than a surface one? You have to have sunlight to grow anything unless you intend to use electricity to grow orange trees. No one does that. Think this through a little. I'm the first guy on the Planet to try anything new, but not convinced on the logic of this one? Keep me informed, perhaps the World is not flat! LOL.
