Zeolite is a naturally occurring, negatively charged product of sea water and hot magma. Its unique porous, cage-like structure works to absorb unwanted positively charged ions and molecules and trap them. This structure has the ability to loosely hold molecules such as calcium, sodium, magnesium and potassium and exchange them when absorbing the undesirable molecules such as ammonia, heavy metals. Zeolite is widely used as a soil amendment for its ability to increase water retention in the soil and allow plants to more easily access it. Unbelievably, it can hold up to 55% of its weight in water and slowly releases it to the plant as needed. Application Rates: Lawns: For new and existing lawns till in 5-15 pounds per 100 square feet in the top 3-4 inches of soil before seeding or laying sod. Water thoroughly. Flower and Vegetable Gardens: Till in 5-15 pounds per 100 square feet into the top 6 inches of soil before seeding, planting, or transplanting. Potting Soils: Thoroughly mix 1-3 pounds with 10 pounds of potting soil and water thoroughly. Not for human consumption.