Grodan Gro-Block Improved GR32 Hugo with Hole, 6" x 6" x 6" - Case of 64 Select Rockwool Type:GR5.6 Large w/ Hole, 3" x 3" x 4" - Case of 256 repelling effect or evaporation

repelling effect or evaporation

Ball Valve Coupling Connectors are available for mainline sizes ranging from 3/4″ to 4″ with socket x socket connections for gluing into PVC pipe

use Dry KoolBloom™ for an additional bloom boost and to facilitate ripening

Perfect to use with fans

Grodan Gro-Block Improved GR32 Hugo with Hole, 6" x 6" x 6" - Case of 64 Select Rockwool Type:GR5.6 Large w/ Hole, 3" x 3" x 4" - Case of 256 repelling effect or evaporationNew 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. A core component of the "Precision Growing" philosophy, Grodan Gro Blocks Improved with Advanced Wetting Technology allow you to cultivate more uniform and high quality crops while using less water