Provided is a hydroponic method that does not involve the use of chemical fertilizers or chemically-synthesized pesticides, and enables the use of said chemical fertilizers or chemically-synthesized pesticides to be reduced. The present invention is a hydroponic method that involves the use of beneficial micro-organisms such as mycorrhizal fungi and partner bacteria thereof. By cultivating, between crops, partner plants that are easily inhabited by mycorrhizal fungi and partner bacteria thereof, and using a hydroponic culturing apparatus that enables an environment in which the abovementioned beneficial micro-organisms flourish to be created, the yield and quality of crops can be increased, and the use of chemical fertilizers and chemically-synthesized pesticides can be reduced or eliminated.
