Multi-crop hydroponic culture method applicable to compositae leaf vegetables mainly planted in Central China

The invention discloses a multi-crop hydroponic culture method applicable to compositae leaf vegetables mainly planted in Central China. In the hydroponic culture method, crop rotation is arranged asfollows: first crop: compositae leaf vegetables are planted in mid-to-late February and harvested in the last ten days of March; second crop: after the first crop is harvested, the compositae leaf vegetables are planted and harvested in the last ten days of April; third crop: after the second crop is harvested, the compositae leaf vegetables are planted and harvested in the last ten days of May; fourth crop: after the third crop is harvested, the compositae leaf vegetables are planted, and the compositae leaf vegetables are harvested three times in total by the last ten days of July; fifth crop: high-temperature-resistant leaf vegetables are planted after the fourth crop is harvested at last, and the leaf vegetables are harvested three times in total by the middle ten days of September; sixth crop: after the fifth