Our blends contain the most diverse variety of mycorrhizal species so that they work with the most diverse variety of plant and soil types. This ensures that no matter what or where you are planting, our blends will contain a mycorrhiza species that will enhance your plant's development. Also, plants can form relationships with more than one type of mycorrhiza depending on soil conditions. For these reasons, a variety of hardy mycorrhizal species is preferred for germination.