Aluminum Sulfate

Lowers soil pH for acid loving plants like azaleas, camellias, gardenias, hemlock, holly, cedar, blueberry, rhododendron, dogwood...turns hydrangeas blue. Includes easy to follow chart. Works in all soil types.

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Q & A

  • The leaves on my azaleas are turning yellow. What should I do to keep them healthy?

    The leaves could be yellowing due to a deficiency of iron, the problem is also known as chlorosis. To correct this, apply Liquid Iron and Aluminum Sulfate. Azaleas need a soil with a low pH, below 6.5, to be able to absorb the iron through the roots. A soil test is highly recommended to make sure the soil is at the correct pH for the plant.

  • How can I make my Hydrangeas turn blue?

    If it is a variety of hydrangea that is able to turn blue, you can use Aluminum Sulfate or Bailey’s Color Me Blue. Check the pH of the soil to make sure it is below 5.5, otherwise the flowers might be purple.

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