Loosen Clay: Earth Science Fast Acting Gypsum granules start working immediately to loosen clay and other compact soils, creating a better environment for plants to thrive! The result is improved water penetration, more workable soil, and better root development. Support Healthy Plants: Loosening soil allows for better water retention and airflow which helps the soil to support healthy plants. Gypsum can also help repair salt-damaged soil. Gypsum adds calcium to soil, which helps plants suffering from blossom-end rot. Finely Ground: Earth Science Fast Acting Gypsum starts working immediately to loosen compact soil. Earth Science gypsum is finely ground, as the small particles penetrate into the soil more quickly. However, the powder is pelletized to allow for easy application. Nutri-Bond: Earth Science Nutri-bond Technology naturally bonds with soil to reduce nutrient run-off and waster by up to 50%. Apply Fast Acting Gypsum quickly and easily with any spreader. Safe For Kids & Pets - Earth Science Gypsum is safe to use on any grass type, and people and pets can use the lawn immediately after application. Earth Science Fast Acting Gypsum starts working immediately to loosen clay and other compact soils, creating a better environment for plants to thrive. The result is improved water penetration, more workable soil, and better root development. Earth Science’s patented Nutri-Bond Technology bonds with the soil to help keep more product where you put it. That’s better for the environment and helps your lawn or garden get the most out of every application. As a result of Nutri-Bond, 1 bag of Earth Science Fast Acting Gypsum does the work of up to 4 bags of regular gypsum.