32 cell natural plant starter. Made of the finest quality Peat and Perlite, Speedy Root has the perfect air-to-water ratio, allowing for optimal aeration and water retention. The environment within these plugs will encourage root branching and help your cutting or seedling develop strong roots, making your plants healthy and hardy! Works great for both soil and hydroponic situations. 2' x 2' x 3 1/2' Plugs