Nitrogen and Iron Fertilizer: Darker Green Liquid Iron contains Nitrogen and Iron to help you achieve that dark green color Maintain Lawn & Supplement Nutrient Deficiencies: Darker Green Liquid Iron is perfect for maintaining lawn or treating lawns deficient in Iron Micronutrients: Darker Green Liquid Iron Contains Micronutrients like Iron and Manganese to Carry Out Essential Plant Functions Great For All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Bahia, Fescue, Ryegrass & Kentucky Bluegrass Application Rates for Lawn and Garden: Versatile Formula can be used on Turf Grass, Ornamentals, Young Plants, Flower Beds, Potting Soil, Young Trees, Garden and Hardy Plants Used Commercially: Used by Farmers and Professionals on Agriculture and Turf Grass all around the world Liquid Iron Blend: Iron is essential to the plant’s production of chlorophyll. Great to enhance the deep green of your lawn Proprietary Fertilizers Made in the USA: All Simple Lawn Solutions products are expertly manufactured with our proprietary manufacturing method, and proudly in the USA by a family-owned company Darker Green Liquid Iron is a liquid Iron fertilizer blended with Nitrogen and Manganese. Darker Green provides essential nutrients needed to darken the green of your lawn. Our decades of research have resulted in formulas that are expertly manufactured with our proprietary manufacturing method, unlike any other product on the market. Nitrogen 0.75% is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages the development of a dense attractive lawn. Iron 6% Iron is essential to the plant’s production of chlorophyll. Please note that if your lawn or plant's current iron levels are sufficient, adding an iron supplement will likely result in little to no visual response. This product is best to use when there is an iron deficiency or suspected iron deficiency or when iron levels are below sufficient.