Utilizing stacked hydroponic (soil-less) technology, the GrowUp Hydrogarden, with its vertical design, reportedly allows one to grow up to 20 plants in just 4 square feet of space, either indoors or outdoors. A complete kit includes 20-gallon water/nutrient reservoir tub and lid, five stackable growing pots, submersible pump, lid access cup, PVC pipe, pH test kit, growing medium and required nutrients.