hydrangea color changing

If I use aluminum sulfate to change hydrangeas to blue, what is the recommended dosage? How often should be applied, and for how long should I apply the aluminum sulfate solution?

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1 Comment To "hydrangea color changing"

#1 Comment By Downtoearthdigs On 07/04/2016 @ 11:19 pm

Here is a link to help you.

https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/change-hydrangea-color.htm ^[1]

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