Plant cultivating apparatus

A plant cultivating apparatus comprising:

• a plurality of growing chambers, each having a ceiling panel and peripheral walls;
• a hydroponic solution tank arranged in each growing chamber;
• sets of pallets in each chamber, each set comprising a plurality of pallets arranged in rows in the respective chamber and supported above said tank in the chamber so that plants placed in the pallets can take root in the solution in said tank;
• guide means in each chamber for guiding movement of the pallets in a direction essentially parallel to the rows;
• conveyor means for moving said pallets along said guide means from an initial growth location;
• artificial light sources for irradiating plants in said pallets in each chamber with light;
• reflecting surfaces on said ceiling and peripheral walls of each said growing chamber, said surfaces having a high light reflectance, said artificial light sources emitting light to irradiate the plants at a low illuminance, the ceiling panel being inclined so that the distance between the ceiling panel and the plants is closer in each chamber in the initial growth location;
• said hydroponic solution tank being constructed to that the depth of hydroponic solution is small under the initial growth location and large under a later growth location;
• said plurality of growing chambers being stacked vertically so that the moving direction of the sets of pallets is alternately reversed in successively higher ground chambers.