Grodan Gro-Block Improved Big Mama, 8" x 8" x 8 " (Case of 18) veg nutrients The polymers also reduce over

The polymers also reduce over and under watering

High salt concentrations in media can cause the shrinkage and death of plant cells due to the excess draw of water through cell walls

Suitable for Organic Production

and a lightweight

Grodan Gro-Block Improved Big Mama, 8" x 8" x 8 " (Case of 18) veg nutrients The polymers also reduce overGrodan Gro Block Improved Big Mama, 8" x 8" x 8 " (Case of 18) 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 volume.