Earth Science, 25 LB, 5,000 SQFT Coverage, Fast Acting Iron, Super Greening Formula Greens Up Grass, Trees, Shrubs, Vegetables & More, Non-Staining Formula, Lasts All Season Long, Nutri-Lock Technology Which Holds Nutrients In Place For Maximum Effectiveness, Reduction Of Nutrient Run Off & Longer Lasting Greening, Contains A Rich Source Of Calcium Essential For Plants To Better Take In Nutrients, Special Granulated Formula Spreads Easily & Clean Through Any Spreader.