Now you can grow beautiful, healthy Hydrangeas without using harsh chemical soil additives. Fast-acting and completely organic, Soil Acidifier will turn your Hydrangea flowers from pink to deep, vivid blue. It works naturally to lower your soil pH to the perfect range for producing those fabulous blue blossoms. Soil Acidifier is approved for organic gardening and contains 100% natural minerals that won't burn your plants. It's an ideal organic fertilizer for acid-loving Blueberries too. 5lb bag.
For established Hydrangeas, sprinkle 2 1/2 cups evenly around the base of the plant in spring and water well. Reapply every 2 months until desired bloom color is achieved. For new plants, apply 1 1/4 cups.
For Blueberries, sprinkle 1 tablespoon evenly around the base of each plant at flowering time in spring and water well. Reapply every 2 months until desired pH is achieved (a pH of 5.5 is ideal).