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Cobalt Nitrate
In the scientific trials
Note: Small black particles will appear in the formula and color will change to a darker almost black color over time
The result of this scientific rigor is Grodan Gro-Blocks Improved with Grodan's Advanced Wetting Agent
Gro Block Improved Large 4"GR10 w/ hole 4"x4"4" Shrink/Strip Soil Cobalt NitrateGrodan Improved Gro Block Improved GR10 Large 4" w Hole 4" x 4" x 4" Shrink wrapped Strip 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 Grodans Advanced Wetting Agent. These leading edge