Disclosed is a growing system that includes a hollow grow tower with planting units configured to hold plants disposed on the tower exterior where the planting units have a passage that extends into the tower interior. The tower also includes a drain port at one end and a water-dispensing nozzle at the other end. The nozzle includes outlet apertures in fluid communication with the interior of the tower where one or more of the nozzle outlet apertures may be square. An enclosure surrounds the tower, and one or more light sources are mounted on the enclosure to direct light towards the tower. The tower and enclosure can be connected to a suspension frame that suspends the entire system off the ground. The system may include a closed-loop irrigation system and a multi-tank cleaning system. System variables, such as water flow, temperature, lighting, and water nutrient level can be computer controlled.
