Fast Acting Sulfur – Earth Science Fast Acting Sulfur granules work immediately to lower the pH of your soil. Help your hydrangeas, azaleas, and blueberries absorb more food and improve fertilizer effectiveness. Lower Soil pH – If your soil pH is too high, your acid-loving plants might need a boost of sulfur. Earth Science Fast Acting Sulfur naturally lowers soil pH to help plants absorb more food. Improve Color – Earth Science Fast Acting Sulfur will help green up your lawn and create colorful blooms! This fertilizer enhancer is great for hydrangeas, azaleas, blueberries, and other acid-loving plants. People & Pet Friendly – Earth Science Fast Acting Sulfur is safe to use on any grass type, and safe for people and pets. Your human and furry friends can use the lawn immediately after application. Nutri Bond Technology – Earth Science’s patented Nutri-Bond Technology bonds with the soil to help keep more product where you put it. Nutri-Bond is better for the environment and helps your lawn & garden get the most out of every application.