Product composition: Formulated for maximum water retention with good aeration, and development of strong, healthy root systems for maximum stem, flower and foliage growth. Rationale/function of each ingredient: SS Advanced Ultra Coir has the dual benefits of peat moss and coconut fiber to hold water and nutrients for optimal plant growth. The perlite provides excellent drainage, resulting in a growing mix that is suitable for most growing conditions. Our organic nutrient package will begin to supply a supplemental charge three to four weeks after planting. And our endomycorrhizal blend enhances the ability of plants to access the nutrients in the root zone.