Ironite Mineral Supplement 1-0-0 Fertilizer is a mineral supplement that will quickly turn plants from yellow to green. It is suitable for use in trees, shrubs, flowers, vegetables, and lawns. The formula is enhanced with beneficial microbes to increase organic activity in the soil. This supplement also contains Advanced Soil Technology to improve the physical characteristics of the soil performance, improve water penetration and reduce soil loss. It is compatible with all soil types and does not contain phosphorus. It is non-staining and non-burning and will provide a long lasting green without excessive growth. 30lb's will cover 10,000 sq. ft. !