Rapid Rooter's breakthrough technology produces unique composted organic materials bonded together with plant-derived polymers. This Rapid Rooter tray features 50 cells to host 50 plugs and is created through a scientifically controlled process. It produces large populations of beneficial microbes which colonize young roots, helping young plants resist disease while maximizing nutrient uptake. The optimal air-to-water ratio within the plug results in rapid early root growth, allowing you to get a quick start to growing large yields. Save the time and purchase a Rapid Rooter tray from General Hydroponics today!