Changing the color of a hydrangea to pink

Discussion in 'Hydrangea' started by Frank, Jul 17, 2005.

  1. Frank

    Frank GardenStew Founder Staff Member Administrator

    Jan 25, 2005
    Likes Received:
    Galway, Ireland
    If you want to change the color of your hydrangeas to pink here is what you can do.
    - First test the pH level of your soil. You will need a pH of 6.5 to achieve pink flowers.
    - To raise the pH of your soil you must make your soil more alkaline. You can achieve this by adding 4 ounces of lime around the base of your hydrangea plant for every point of the pH scale. For example if you have a pH of 4.5 you need to add 2 X 4 ounces of lime.

    Here is a more technical explanation why hydrangeas change color:

    This is an answer to a question member Seattle Gardens asked :smt002
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