Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) botanicare and help to sustain healthy

and help to sustain healthy beneficial microorganism populations in the soil

Versatile Use: Ideal for a variety of plant materials

agricultural and fermentation processes because of its ability to tolerate extreme temperatures and low humidity

Blank panel helps conceal gaps in the rack and supports proper thermal control by directing airflow

Bloom: 14 ml/gallon

Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) botanicare and help to sustain healthyGrodan Gro Block Improved GR10 Large with Hole, 4" x 4" x 4" Case of 144 New and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire substrate