1-You cannot change white hydrangeas to pink or blue.

Sometimes white can become pink or red as they age, but it’s not guaranteed and there’s nothing you can do to really influence this.
2- It’s difficult to change the intensity of the color of a hydrangea bloom. This means that while you can get it to turn blue or pink, you can’t change the brightness or shades of pink and blue. You have to just let the blooms do this on their own and accept what nature gives you. There are several reasons for this, such as the heredity of the plant, the weather conditions, and the health of the plant.
3- If you live in a very hot climate, you will likely never see deep shades of red. They just don’t do well in the very warm climates. You can get a dark pink, but people in the south usually don’t see a true red. You might be able to do so if you’re raising them in containers.

Now that you know the limitations on color changes, let’s take a look at how you can get your hydrangeas to change to some of the common popular colors…

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