Rockwool Cubes, 1.5 x 1.5 inches

A-Ok 1.5" x 1.5" rockwool Starter Plugs are ideal for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks. A-Ok plugs come labeled with instructions in a shrink-wrapped sheet that fits a standard 10" x 20" tray (flat).