Description
Grodan Granulate 20 kg Bag is a premium loose stone wool (rockwool) substrate designed for professional and hobby growers seeking superior water retention, excellent aeration, and consistent plant performance in hydroponic, soilless, and container growing systems.
Made from high-quality molten basalt rock and limestone, spun into fine, hydrophilic fibres, this ultra-clean and sterile granulate provides an inert, pH-neutral growing medium that gives precise control over nutrient delivery and root zone conditions. Offers outstanding moisture buffering while maintaining optimal oxygen levels around the roots—ideal for water-hungry crops or plants that demand uniform hydration.
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