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. Billâ€™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%.