Micronized Endo mycorrhizal micronized powder inoculum consists of a 4 species blend of spores of arbuscular mycorrhizal fungi (endomycorrhizal fungi). The powder comes in a particle size less than 300 microns (#50 screen). About 90% of the world’s plant species form mycorrhizae with these beneficial endomycorrhizal fungi. These beneficial fungi colonize plant roots, expand into the surrounding soil and greatly increase the root’s ability to absorb water and nutrients, while improving plant yields and health.