1 In. Rockwool Stonewool Starter Grow Cubes for Plant Propagation, Seed Starting, Hydroponic Grow Media (4 Pack)

They are melted at high temperatures and spun into fine fibers, then compressed into blocks by a unique process, which makes them durable. It also fosters the formation of strong and healthy root systems, creating an ideal environment for root development. Each cube has a hole for your seeds or cuttings, and you can transfer the cubes to any medium when the roots develop; It is also easier to observe the growth on one sheet. These rockwool plugs are much easier to use than soil and suit all growers.