The study of soil science and soil microbiology has revealed the secret of how plants grow in nature. Most species of plants are now known to have beneficial microorganisms know as microrrhiza attached to their roots in a symbiotic relationship. This allows plant roots to extract nutrients from the soil with incredible efficiency, giving the plants greatly enhanced vitality and vigor. For optimum results, use 'Earth Magic' with "Protein Crumblies":/catalog/product/99839/. Once a year (spring, summer or fall) mix 1 part (weight or volume) 'Protein Crumblies' to 2 parts 'Earth Magic' and broadcast onto the soil surface or scratch into the mulch if it's covering the soil. Water in immediately and let the process begin! A 0.12 cu. ft. tub covers 200 sq. ft. A 0.6 cu. ft. bag covers 1000 sq. ft.