Hi-Yield Aluminum Sulfate 12lb
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.