Hi-Yield Aluminum Sulphate 4 lb

Helps create an acid soil condition for plants. Intensifies Blue color in Hydrangeas. Use on Azaleas, Gardenias, Camellias, Rhododendrons, Blueberries and others listed on label. Application Rates: Shrubs: 1 lb. per 3 ft. of height. Trees: 1 lb. per inch of diameter. To correct alkaline soil: 5 lbs. per 100 sq. ft.