Grodan Improved Gro-Block, Jumbo 6" x 6" x 4", Case of 64 rockwool Outfitted with a 1/3 HP

Outfitted with a 1/3 HP motor that can pump up to 1200 gallons per hour

These growing blocks are used for direct sowing or "blocking on" of Macro and Multiblock raised plants

Carbon Steel Blade/Aluminum Handle

Hydrofarm's Powerhouse convertible ballasts feature engineered transformers made to the exacting American National Standards Institute specifications

Formulas are sediment free and are compatible with all dosing and irrigation systems in including fine dripper heads

Grodan Improved Gro-Block, Jumbo 6" x 6" x 4", Case of 64 rockwool Outfitted with a 1/3 HPGrodan Improved Jumbo (White Foil) 6 x 6 x 4 (Case of 64) Grodan Improved Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with our Advanced Wetting Agent. These leading edge blocks have the