Research-Backed Stonewool Blocks for High-Yield Hydroponic Production
The Grodan® Gro-Block Improved GR10 Large is the result of a research partnership between Grodan, Wageningen University & Research, and top commercial growers across North America. At 4"x4"x4", this large-format block delivers the optimal balance of water retention, aeration, and root zone stability for high-yield cultivation.
Key Features
- 4" x 4" x 4" large format block with pre-cut plant hole — GR10 grade
- Strip packaging — case of 144 blocks, commercial bulk format without retail wrapping
- 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
Case of 144 blocks, strip-packaged commercial bulk format. Intended for commercial use.
Grodan Gro-Block Improved Large GR10 – 4"x4"x4" w/ Hole | Strip | Case of 144
Grodan Gro-Block Improved Large GR10 – 4"x4"x4" w/ Hole | Strip | Case of 144
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What Makes Us Different
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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Premium Quality
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Highest Purity
Never Compromise on the Quality of Inputs.
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Crop Specific
Customized Fertilizer for your Favorite Crops.
