Research-Backed Stonewool Blocks for High-Yield Hydroponic Cultivation
The Grodan® Gro-Block Improved GR5.6 Large is the result of a research partnership between Grodan, Wageningen University & Research, and top commercial growers across North America. At 3"x3"x4", this tall-format block delivers exceptional root zone depth, uniform water and nutrient distribution, and Grodan’s most advanced steering capabilities for high-yield production.
Key Features
- 3" x 3" x 4" large format block with pre-cut plant hole — GR5.6 grade
- Shrinkwrap/Strip packaging — commercial bulk format for easy handling and storage
- Advanced Wetting Agent (AWA) for optimal fiber structure and uniform WC/EC distribution
- Improved hydrophilic technology for enhanced water distribution over the full block height
- Optimized wool structure for faster rooting-in and nutrient solution replenishment
- Maintains structure, firmness, and rigidity throughout the growing process
- Reusable and recyclable — part of Grodan’s sustainable growing program
What’s Included
Shrinkwrap/Strip-packaged blocks, commercial bulk format. Intended for commercial use.
Grodan Gro-Block Improved Large GR5.6 – 3"x3"x4" w/ Hole | Shrinkwrap/Strip
Grodan Gro-Block Improved Large GR5.6 – 3"x3"x4" w/ Hole | Shrinkwrap/Strip
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At the leading edge of the market, Custom Hydro stands out by providing the growing industry with fertilizers that are not only of premium quality but also feature innovative
solutions tailored for the unique needs of hydroponic and organic farming practices.
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