earth science 2.5 lb bag fast acting garden sulfur covers 500 sq ft. naturally adds essential elements back into the soild, lowering the ph level to help make nutrients more available to plants. lowers soil ph for acid-loving plants. patented nutri-bond technology allows sulfur to bond with soil and help reduce nutrient run-off and waste which is better for the environment and helps your lawn or garden get the most out of every application. exclusive fast acting formula starts working immediately. one bag of earth science fast acting sulfur does the work of 4 bags of agricultural sulfur. designed for garden application.