Ground-Breaking Micronutrient Complex. Company founder, chemist and gardener Bill Muskopf developed a formula he named Spray-N-Grow Micronutrients that produces amazing results. Plants grow faster, produce more blooms and are healthier. Bill's formula contains 17 micronutrients not available in fertilizers and is formulated so they are more powerful together than separate. Independent research confirms Spray-N-Grow Micronutrients delivers significant benefits to plants. Iron 0.10% and Zinc 0.05%.