Grodan Improved Gro-Block, Jumbo 6" x 6" x 4" (Case of 64) Organic replace the cartridge or clean

replace the cartridge or clean it

That provides the ability to have customized lighting spectrum and timing control

The patented pressure differential system provides uniform flow rate over a wide range of operating pressures ensuring precise water distribution

This easy-to-use 2-part Dutch style fertilizer is comprised of only (2) individual products marked A & B

Effective as a final flush to clean growing media

Grodan Improved Gro-Block, Jumbo 6" x 6" x 4" (Case of 64) Organic replace the cartridge or cleanGrodan 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 optimal fibre structure and physical properties for crop uniformity, more even