Roots Organics Lush Potting SoilRoots Organics Lush growing mix is an amended peat based media that delivers absolute consistency and control. What makes Lush superior to the competition? Nutrient rich, this robust mix combines a well measured primary fertility package with ideal foundational components to maximize yield in mature flowering plants. The precise ratio of peat, coir, perlite, pumice and worm castings has been added to create ideal water holding capacity and drainage.