Rootmaker Propagation Trays, Case of 25 Trays - 18 Cells Per Tray (4 Inch Depth) Creates a fibrous, non-circling root system without toxic chemicals Promotes horizontal root branching, accelerates plant growth, and increases vigor These trays will have your plants are equipped for rapid transplant success and long-term health Complements a variety of production methods above ground, in-ground or in-pot 25 Trays, 18 Cells Each - Cells measure 3.25 in. x 3.25 in. x 4 in.