Supergreen Aluminum Sulphate helps acidify soil making growing conditions more desirable for acid-loving plants such as hydrangeas, azaleas, and blueberries etc. Changes the colour of pink hydrangeas to blue. WILL NOT CHANGE WHITE HYDRANGEAS TO PINK OR BLUE.

Aluminum Sulphate

  • Test soil pH before use. If soil is alkaline (pH exceeds 7), use Aluminum Sulphate to lower the pH. Apply every 3-4 weeks as needed.

    Potted Plants: dissolve 3 ml per 1 L of water (⅗ tsp / 1 qt) and drench soil with the mixture.

    Gardens: apply early spring using 500 g per 10 m² (1 lb / 100 ft²) or 45 – 60 ml (3 – 4 tbsp) per medium sized individual plant. Work into the surface of the soil and water well.

    Do not exceed label application rates. Lowering the pH below 5 may cause nutrient deficiencies and possible aluminum toxicity.