Multi-Plant Stonewool Grow Slabs: Raising Space Efficiency Through Stonewool Grow Media via RedRock Block's Multi-Plant Grow Slabs Stonewool is a mainstream phrase in the commercial horticulture industry ever since the 1970’s. As we progress to modern day, stonewool has become more and more mainstream to use in a commercial greenhouse facility. With research and slight modifications this insulator became one...