An especially designed fertilizer for the care and maintenance of Azaleas. It was developed in conjunction with Mr. Bart Brechter, Garden Curator of the fabulous Bayou Bend Gardens in Houston, Texas. MicroLife Acidifier 6-2-4 is outstanding nutrition for all plants that want a low pH environment. Contains extra Sulfur (14%) and Humates to bring out the true health and true beauty of your Azaleas, Roses and Acid Loving Plants.