Change the Color of Hydrangeas

Change The Color of Hydrangeas

How to change the color of hydrangeas. Yes, for the most part, you can change the color of hydrangeas, with the exception of white hydrangeas.

White Hydrangeas

You can’t change the color of white hydrangeas. The only variation with white hydrangeas comes with the plant’s age. It will sometimes take on a hue but it really does it on its own and can’t be forced.

Blue to pink or pink to blue, now those I can help you change. Want to learn how?

Change The Color of Hydrangeas By + or –

To change the color of hydrangeas it is a matter of adding or subtracting minerals that occur naturally in your current growing soil. For bushes that are growing in soil, it is a little tricker to change the color because you are changing the PH levels of the soil. It certainly helps to have a Soil Tester – Moisture, Light & pH tester.

Changing the color of hydrangeas that are potted is a much simpler task. You have complete control over the soil the plant is contained in

Pink to Blue

If your hydrangeas flowers are currently pink and you wish to make them a beautiful hue of blue you will need to change the ground soil composition. Acidic soil contains higher aluminum contents, which are needed to have blue hydrangea flowers.


STEP 1 – Water the bush well. Mix up 1 tablespoon of Aluminum Sulfate per gallon of water.

STEP 2 – In order for your flowers to maintain that beautiful hue of blue, feed your bush a steady diet of aluminum sulfate throughout the growing season. The bush will benefit from coffee grounds and grass clipping additions to the top of the soil to help maintain the coloring between aluminum sulfate additions.

Blue to Pink

If your bush is naturally blue in color, you will need to block the plant from leaching aluminum from the soil. The soil of pink hydrangea have an alkaline base, The only way I have heard to do this is to add Dolomite Lime many times a year. This will change the PH level of the soil.


STEP 1 – Water the bush well in the morning.

STEP 2 – In the evening work 1-2 cups of dolomitic into the soil a few times a growing season.

Fertilizing Hydrangeas During The Growing Season

Keep your hydrangeas healthy all season. Look for fertilizers with high phosphorus levels to fertilize the bush. Here is a good product on Amazon – Hydrangea Fertilizer.

As you can see.  It is pretty simple to change the colors of your hydrangeas. Don’t forget you be sure to display and dry some of your works of art.  Learn how here.

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