Abstract: A solar greenhouse includes walls and a roof which together with a floor form a closed chamber. Windows are provided to permit the entry of light into a major part of the chamber where growth will occur while restricting light to a minor portion thereof where germination of seeds occurs. Racks for stacked growing trays are provided; preferably the upper part of the chamber is used for germination. The greenhouse further includes apparatus for accumulating solar energy in the form of electrical energy so as to drive irrigation pumps and fans and also in the form of thermal energy to assist in maintaining desired temperatures in the chamber.