A solution cultivation method for a low potassium vegetable, wherein the entire cultivation time from seeding to harvesting is divided into a first cultivation period and a second cultivation period depending on the vegetable to be cultivated. In the first cultivation period, the vegetable is cultivated in a first cultivation liquid that contains a first solution cultivation fertilizer containing potassium. In the second cultivation period, the vegetable is cultivated in a second cultivation liquid that contains a second solution cultivation fertilizer being substantially free from potassium. During the second cultivation period, an air flow is applied at a controlled speed to the growing point of the vegetable.
