Grodan is the global benchmark in mineral wool growing media, trusted by commercial growers and serious hobbyists worldwide. Their rockwool products are spun from natural basalt and limestone into a precision-engineered fibre structure that delivers the optimal air-to-water ratio at the root zone — the single most important factor in consistent, vigorous plant growth. Inert, pH-stable, and free from contaminants, Grodan media works with your nutrient solution rather than against it, across every stage of growth.
🌱 Rockwool Propagation Cubes
The Grodan MM PM 40/40 Wrapped Propagation Cube is the industry-standard 40mm cube for seeds and cuttings, featuring a pre-formed seeding hole, downward root-directing fibre orientation, and universal compatibility with hydroponic, coco, soil, aero, and DWC systems, available in a 12-pack. For growers needing a larger propagation cube, the Grodan Delta 4G 75mm Wrapped Cube offers a no-hole design suited to multiple planting methods, individually wrapped for easy handling, available in a 6-pack.
🧱 Full-Cycle Grow Blocks
The Grodan Hugo Grow Wool Block is a 150mm x 150mm x 150mm large-format block engineered to take a plant from transplant all the way through to harvest without switching media. Built for high-frequency fertigation and run-to-waste systems, it maintains the air-to-water balance through frequent watering cycles and is compatible with Netafim Netbow feeding rings.
💡 Why Grodan?
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Global benchmark in rockwool : trusted by commercial growers and research facilities worldwide
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Spun from natural basalt and limestone : inert, pH-stable, and consistent cube to cube
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Optimal air-to-water ratio : engineered fibre structure keeps oxygen available at the root zone
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Sterile and contaminant-free : won't interfere with your nutrient solution or pH
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Wrapped for stability : outer wrap maintains cube shape during handling and transplanting
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Compatible with all major hydroponic systems : NFT, DWC, drip, flood and drain, run-to-waste, aero, coco, and soil
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Suits home and commercial growers : consistent quality at every scale
Shop the full Grodan range at Growers Depot with more products and categories to explore.
