GreenGro? Ultrafine is a soluble blend of Mycorrhizae, beneficial bacteria, kelp and humic. This is a highly effective and easy-to-use all-in-one product that will dramatically improve the health and vigor of your root systems. GreenGro mycorrhizae blend contains a diverse selection of endo mycorrhizal fungi and beneficial root colonizing bacteria. It creates a network of micro filaments and microbes that act as an extension of the plants? root system. The Ultrafine blend is perfect for hydroponic and soil drench applications. Great for all types of soft rooted plants such as fruits, vegetables, herbs and flowers.