Grodan Improved Gro-Block, Jumbo 6" x 6" x 4", Case of 64 drying-racks When used as a foliar

When used as a foliar spray in the first weeks of flowering

The YELLOW side attracts and kills aphids

An incredibly high diversity of microorganisms

More than twice the amount of wool as our Hugo Block

Golden Oyster (Pleurotus citrinopileatus) is a tropical strain that thrives in warmer temperatures and tends to fruit in summer months

Grodan Improved Gro-Block, Jumbo 6" x 6" x 4", Case of 64 drying-racks When used as a foliarGrodan 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