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Grodan Rockwool Starter Cubes Great for seed starting, Grodan Stonewool is made from natural rock which is melted and then spun into fine fibers and pressed into cubes. These cubes absorb nutrient solution while still allowing oxygenation of roots for rapid plant growth. Start seedlings in these cubes and then transfer them to blocks. Product ID: XROCKCLN Category: Miscellaneous Equipment-Cloning & Seed Starting Select One Sheet of 200 - 1" cubes $13.97 Sheet of 98 - 1.5" cubes $12.69 Sheet of 50 - 2 Inch $9.99 Quantity

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