The Grodan Delta Gro Blocks (4x4x2.5") offer a superior growing medium made from high-quality stone wool (rockwool). Created from molten rock spun into fibers and compressed into various forms, Gro...
The Grodan Delta Gro Blocks (4x4x4") offer a premium growing medium crafted from high-quality stone wool (rockwool), designed to optimize plant growth at every stage. Made from molten rock spun int...
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