Hi-Yield Aluminum Sulfate is a fast-acting soil acidifier for acid-loving plants. Use it to lower soil pH for azaleas, rhododendrons, camellias, gardenias, blueberries, and hydrangeas. It also intensifies blue color in hydrangeas by making aluminum more available in the soil.

• Lowers soil pH for acid-loving plants
• Intensifies blue color in hydrangeas
• Fast-acting granular formula
• Shrubs: 1 lb per 3 ft of height
• Trees: 1 lb per inch of trunk diameter
• Alkaline soil correction: 5 lb per 100 sq ft
• Works on azaleas, gardenias, camellias, rhododendrons, blueberries, and more
• 3.25 Lb bag