A hydroponic growing system that comprises a plurality of parallel horizontal pipes, a vertical drain pipe, and a plurality of nutrient-delivering tubes. The horizontal pipes are adapted to support crops that receive nutrients from the nutrient-delivering tubes and grow in high density. The horizontal pipes have opposite first and second ends, as well as a plurality of openings along a length, and a plurality of pipe segments extending angularly from an outer surface. The vertical drain pipe has a plurality of angular pipe extensions along a length, which mate with one of the first and second ends of the horizontal pipes. The nutrient-delivering tubes have openings along a length and extend from the vertical drain pipe, branching through the pipe segments extending from the horizontal pipes.