Large-Format Stonewool Blocks for High-Yield Commercial Cultivation

The Grodan® Gro-Block Jumbo Improved is the result of a research partnership between Grodan, Wageningen University & Research, and top commercial growers across North America. At 6"x6"x4", the Jumbo delivers exceptional root zone volume, uniform water and nutrient distribution, and Grodan’s most advanced steering capabilities — ideal for large-format, high-value crops.

Key Features

• 6" x 6" x 4" large format block — ideal for high-yield crops requiring substantial root zone volume
• White foil wrap for light reflection and temperature management
• Advanced Wetting Agent (AWA) for optimal fiber structure and uniform WC/EC distribution
• Superior steering capabilities for precise crop management throughout the cycle
• More uniform water distribution supports a well-defined root system with higher water and nutrient uptake capacity
• Produces robust, vigorous crops with improved uniformity
• Reusable and recyclable — part of Grodan’s sustainable growing program

What’s Included

Case of 64 blocks, white foil wrapped for cleanliness and ease of handling.