Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) Fertilizer Dimension - 1088*40*26MM

Dimension - 1088*40*26MM

and various other ventilation projects

After the air is filtered

Save big on buying the 50lb Bag(s)

- "Wings" For added reflectivity

Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) Fertilizer Dimension - 1088*40*26MMGrodan Gro Block Improved GR5. 6 Large with Hole, 3" x 3" x 4" (Case of 256) 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