Grodan Pargro Jumbo Block 6x6x4 – Stone Wool Growing Media
Built from basalt-derived stone wool, the Grodan Pargro Jumbo Block provides a consistent, inert substrate that won’t lock up or release nutrients, giving growers full control over feed strength and EC. Each pre-drilled hole speeds transplanting from starter plugs, while the black/white foil wrap promotes quick, balanced drainage with moderate water-holding capacity. Pargro’s rapid water distribution and excellent re-saturation make irrigation simple and repeatable, even at scale.
Rockwool Blocks for Hydroponics: Fast Re-Saturation & EC Control
Uniform density throughout the block encourages dense, healthy root zones and even growth across the canopy. The pathogen- and seed-free composition supports clean production and dependable performance from veg through finish in drip, ebb-and-flow, and other recirculating systems. Ideal for growers transitioning from coco, peat, or soil to stone wool, these 6" x 6" x 4" blocks (pallet of 704 loose blocks) bring reliable results and streamlined irrigation management.
Key Benefits:
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Collaborative Innovation, Proven in the Field – Developed with insights from Wageningen University & Research (Netherlands) and refined by leading North American cultivators for reliable, real-world performance.
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Advanced Wetting Agent for Uniform WC & EC – State-of-the-art wetting technology promotes even Water Content (WC) and Electrical Conductivity (EC) across each block, improving nutrient delivery and irrigation consistency.
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Precision-Engineered Fiber Structure – Purpose-built stone wool matrix supports rapid root initiation and dense lateral branching for efficient water and nutrient uptake.
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Market-Leading Growth Steering – Highly responsive hydration and drainage characteristics enable precise crop steering from veg through finish, improving vigor and uniformity.
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Bulk Efficiency: 704 Blocks per Pallet – Palletized, loose-packed format scales effortlessly for commercial rooms, reducing handling time and cardboard waste.
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Optimized for Hydroponic Systems – Ideal for drip and ebb-and-flow; fast re-saturation and balanced drainage simplify feed scheduling and reduce irrigation guesswork.
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Stable EC, Predictable Results – Inert, pathogen-free stone wool won’t bind or release nutrients, helping maintain target EC and pH for more predictable growth.
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Uniform Density = Uniform Canopy – Consistent block density supports even root colonization, translating to tighter internodes and a more uniform canopy.
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Pre-Drilled Planting Hole – Speeds transplanting from starter plugs, reduces transplant shock, and standardizes planting depth across the tray or table.
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Black/White Foil Wrap Performance – Promotes quick, balanced drainage with moderate water-holding capacity for steady moisture and temperature management.