Root Riot Tray Set Root Riot cubes are a new easy to use organic propagation medium developed to make germination from seeds or cuttings simple & fast. These Root Riot Tray Sets are supplied ready to use & with easy to follow instructions enable even the most novice gardeners to succeed with plant propagation. Consists of 24 cubes within a 12" (31cm) x 7½" (19cm) reusable carrier tray. Cubes manufactured from composted organic materials inoculated with micro nutrients to nourish young plants & beneficial rooting fungi to aid root development. The 'spongy' texture of the cubes retains the exact water to air ratio required for healthy, rapid root growth. Each cube measures 1¼" x 1¼" x 1½" deep (32mm x 32mm x 38mm deep) with a pre-formed hole in the top of the cube ready for either seed or cutting.