Turn anemic looking plants into healthy, vigorus, hardy specimens with a naturally occuring iron-potassium silicate (also called glauconite), which contains marine potash, silica, iron oxide, magnesia, lime, plus as many as 30 other trace minerals! Greensand will not burn, improves crumb structure, holds moisture where the plants roots are, and relases potassium to improve photosynthesis. Application Rate is 10-20 lbs. per 1,000 square feet.