To provide conditions suitable for spinach in the cultivation of spinach using artificial lights. A spinach cultivation method, said method comprising a step wherein a procedure for irradiating spinach with red light (a red stage) and a procedure for irradiating spinach with blue light (a blue stage) are separately and independently carried out in an arbitrary order, characterized in that: the sum of the daily accumulated light amount in the red stage and the daily accumulated light amount in the blue stage is 9-22 mol/m2.day and the total irradiation time in the red and blue stages is 16-24 hours per day.本發明的課題為以提供一種在利用人造光之菠菜之栽培,適於菠菜之條件作為目的。本發明的解決手段為一種菠菜之栽培法,其特徵為包含以任意順序個別獨立進行將紅色光照射在菠菜之流程(紅階段)、與將藍色光照射在菠菜之流程(藍階段)的步驟,前述紅階段之日累積光量與前述藍階段之日累積光量的合計為9~22mol/m2.day,且前述紅階段與前述藍階段的合計照射時間每一日為16~24小時。
