Four species of endomycorrhizal fungi, 7 species of ectomycorrhizal fungi, 5 species of beneficial bacteria. About 90% of plant species form beneficial relationships with mycorrhizal fungi. Add to seedbeds when sowing and work into the soil around your trees and shrubs to boost root growth, nutrient uptake and the health of your plants and soils. When seeding use 1 tsp/ft, in beds mix in 2#/100 sq ft. When transplanting bare-root trees, use 1 oz/inch of stem caliper. For restoring fields broadcast 60#/acre before or during planting.