Big Foot Granular Mychorrizae is a unique endomychorrizal blend, which works at a rapid pace to stimulate and promote mychorrizal colonization. Our customized product uses 50% less inert clay with mychorrizal spores; we add other useful ingredients in the place of clay that are beneficial to plant growth and vitality. We add a mixture of biochar, worm castings, kelp, humic acid, trace minerals, and micronutrients, which dramatically improves the results that would be obtained from just mycorrhizae and clay.