Provided is a plant cultivation method that is simple and energy efficient, and uses artificial lighting, which has an excellent growth-promoting effect, said plant cultivation method involving promoting the growth of plants by separately and independently carrying out, in fixed time periods, a step S1 in which a red illumination light is applied to plants, and a step S2 in which a blue illumination light is applied to the plants. In the plant cultivation method, a very prominent plant growth-promoting effect can be obtained using a simple technique in which red illumination light and blue illumination light are alternately applied.本發明係提供一種作為簡便且能量效率佳，生長促進效果優異之藉人工光照射而成之植物栽培方法，其係藉由於一定期間內分別獨立地進行對植物照射紅色光照明光之步驟S1及對植物照射藍色光照明光之步驟S2，以促進植物生長之植物栽培方法。此植物栽培方法係藉由交互照射紅色光照明光及藍色光照明光之簡便的方法，可得到非常顯著的植物生長促進效果。
