SteadyGROWpro grow medium is specifically formulated for the germination, propagation, and growth of plants. It's cell structure allows for optimal water retention and air flow, thanks to an aromatic-based. SteadyGROWpro grow medium is specifically formulated for the germination, propagation, and growth of plants. It's cell structure allows for optimal water retention and air flow, thanks to an aromatic-based system of thermoset carbon based polymers. Unlike rockwool, SteadyGROWpro is eco-friendly, and can be safely ground for disposal or incinerated with no harm to the environment.