Stonewool Grow Block Supplier Launches New PRO Line of Stonewool Grow Media Stonewool Grow Media Manufacturer, RedRock Block, Launches RedRockPRO, a New Line of Stonewool Grow Blocks, Plugs, Slabs for Large-scale Professional Growers, Greenhouse Operators, and Indoor Farmers. North American manufacturer of high quality stonewool grow media, RedRock Block, recently introduced a complete new line of locally sourced and manufactured...