Stone wool, also known as wool or mineral wool, is a type of soilless, inert growing media ideally suited to indoor cultivation of all plants, from cannabis to vegetables and floriculture.
Grodan invented and debuted stone wool in 1969, and in the decades since then, our company has led the way in advancing indoor gardening technology. We love to share our knowledge on best practices for rapid root development, and how to achieve consistent, efficient production and maximum yields with minimal resource inputs.
There’s a reason stone wool is the preferred choice as a substrate, thanks to its compatibility with both soil-based and hydroponic cultivation systems for irrigation, lighting, automated nutrient delivery and other top precision growing techniques.
The standardized size and shape of each Grodan stone wool product make it easy for cultivators to build a graduated system that grows with seedlings through maturity and harvest. And after the growing cycle is complete, stone wool is recyclable in more and more places around the world.