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 optimal fibre structure and physical properties for crop uniformity, more even Water Content (WC) and Electrical Conductivity (EC) distribution throughout the entire block, and the greatest steering capabilities available. Water distribution is more uniform throughout the entire block which is the basis for a well-defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops.

Gro Block Improved GR4 Small 3" w/Hole 3" x 3" x 2.6" Strip
Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Shrink wrapped/Strip
Gro Block Improved GR7.5 Medium 4" w/Hole 4" x 4" x 3" Strip
Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip
Gro Block Big Mama, 6" x 6" x 5.6" Block
Gro Block Big Mama, 8" x 8" x 8" Block