Speak With a Lighting Professional


Grodan has been manufacturing hydroponic grow media (also called substrates) for over 40 years. Their best-selling product, stonewool, is made from a natural volcanic rock called basalt. Stonewool fibers are an ideal growing medium because they provide an even distribution of water and nutrients to plants. All Grodan substrates are clean, contain no pollutants, and are free of plant diseases.