Ideal for separating plant or seed stock. This kit includes an 8 inch x 12 inch grow tray, 24 site tray insert, and a 4 inch humidity dome with adjustable vent. Rapid Rooter plugs are fortified with General Hydroponic micronutrients for abundant root growth. The optimal air-to-water ratio within the plug matrix results in explosive early root growth. Use Rapid Rooter for robust early rooting that supports explosive plant growth.