Abstract: A hydroponic device using the Nutrient Film Technique (NFT), which device is arranged as a vertical growing system with gravity flow of nutrient water to the grown plants. The hydroponic device comprises growing vessels, an inflow of nutrient water into the growing vessel and an outlet of the nutrient water from the growing vessel. At least two growing vessels (1) are comprised, which are placed one above the other in a longitudinal but mutually opposite inclination, wherein the lower end of each inclined growing vessel (1) is provided with an outlet socket (3) for output of the nutrient water, which outlet socket (3) serves as the inflow of the nutrient water into the attached upper end of the lower positioned and inclined growing vessel (1).