Pre-Cut Stonewool Slabs for Seamless Block-to-Slab Transitions

The Grodan® Gro-Slab Improved with pre-cut holes is the result of a research partnership between Grodan, Wageningen University & Research, and top commercial growers across North America. At 36"x6"x3" with 3 pre-cut 4"x4" holes, this thinner-profile slab is engineered for direct block-to-slab transplanting, eliminating the need for manual cutting and reducing labor while maintaining optimal root zone continuity.

Key Features

• 36" x 6" x 3" slab with 3 pre-cut 4" x 4" holes — designed for seamless 4" block integration
• Thinner 3" profile — ideal for crops with shallower root zone requirements
• Eliminates manual hole cutting — reduces labor and improves consistency
• Advanced Wetting Agent (AWA) for optimal fiber structure and uniform WC/EC distribution
• Improved hydrophilic technology for enhanced, uniform water distribution across the full slab
• Optimized drainage and aeration balance for superior root zone management
• Maintains structure, firmness, and rigidity throughout the growing cycle
• Reusable and recyclable — part of Grodan’s sustainable growing program

What’s Included

White/Rockwool wrapped slabs with 3 pre-cut 4"x4" holes. Intended for commercial greenhouse and indoor farm use.