Earth Science 2.5 lb. Bag Fast Acting Garden Sulfur. It covers 500 sq. ft. and naturally adds essential elements back into the soil, lowering the pH level to help make nutrients more available to plants. This patented Nutri-Bond technology allows sulfur to bond with soil and reduce nutrient run-off and waste, benefiting the environment and your lawn or garden. The exclusive Fast Acting formula starts working immediately, doing the work of 4 bags of agricultural sulfur. Designed for garden application.