A hydroponic cultivation system for plants includes a first plant cultivation apparatus to hydroponically cultivate plants using a first liquid fertilizer, a first supply path to supply the first liquid fertilizer, a second plant cultivation apparatus to hydroponically cultivate plants using a second liquid fertilizer having a component differing from a component of the first liquid fertilizer, a second supply path to supply the second liquid fertilizer, and a tray carrier device to carry cultivation trays with the plants thereon between the first plant cultivation apparatus and the second plant cultivation apparatus. The cultivation trays are arranged in stages and mutually connected in series to the first supply path via a removable hose in the first plant cultivation apparatus, and the cultivation trays are arranged in stages and mutually connected in series to the second supply path via a removable hose in the second plant cultivation apparatus.
