Big Foot Mycorrhizae Ecto-Mycorrhizae, 5 lb.The first fungi based product on the market that is specifically designed to work on conifers, oaks, shrubs, arborvitae and other woody plants. Big Foot Ectomycorrhizae is a high performing, all natural and safe root inoculant. The added beneficial ingredients will work on all plants, but the mycorrhizal fungi is specific to ecto loving plants. Proven to increase yields, plant health, and decrease drought stress and transplant shock. Big Foot