Hydrangea Color - How Do I Change The Color Of A Hydrangea
While the grass is always greener on the other side, it seems the hydrangea color in the yard next door is always the color you want but do not have. Not to worry! It is possible to change the color of hydrangea flowers. If you have been wondering, how do I change the color of a hydrangea, keep reading to find out.
Why Hydrangea Color Changes
After you have decided that you want to make your hydrangea change color, it is important to understand why hydrangea color can change.
The color of a hydrangea flower depends on the chemical makeup of the soil it is planted in. If the soil is high in aluminum and has a low pH, the hydrangea flower will be blue. If the soil has either a high pH or is low on aluminum, the hydrangea flower color will be pink.
In order to make a hydrangea change color, you have to change the chemical composition of the soil it grows in.
How to Make Hydrangea Change Color to Blue
More often than not, people are looking for information on how to change color of hydrangea flowers from pink to blue. If your hydrangea flowers are pink and you want them to be blue, you have one of two issues to fix. Either your soil is lacking in aluminum or your soil's pH is too high and the plant can't take up the aluminum that is in the soil.
Before starting a blue hydrangea color soil treatment, have your soil around the hydrangea tested. The results of this test will determine what your next steps will be.
If the pH is above 6.0, then the soil has a pH that is too high and you need to lower it (also known as making it more acidic). Lower the pH around the hydrangea bush by either spraying the ground with a weak vinegar solution or using a high acid fertilizer, like those made for azaleas and rhododendron. Remember that you need to adjust the soil where all the roots are. This will be about 1 to 2 feet (30 to 60 cm.) beyond the edge of the plant all the way into the base of the plant.
If the test comes back that there is not enough aluminum, then you need to do a hydrangea color soil treatment that consists of adding aluminum to the soil. You can add aluminum sulfate to the soil but do so in small amounts through the season, as this can burn the roots.
How to Change Color of Hydrangea to Pink
If you would like to change your hydrangea from blue to pink, you have a more difficult task ahead of you but it is not impossible. The reason that turning a hydrangea pink is more difficult is there is no way to take the aluminum out of the soil. The only thing you can do is try to raise the pH of the soil to a level where the hydrangea bush can no longer take in the aluminum. You can raise the pH of the soil by adding lime or a high phosphorus fertilizer to the soil over the area where the hydrangea plant's roots are. Remember that this will be at least 1 to 2 feet (30 to 60 cm.) outside the edges of the plant all the way into the base.
This treatment may need to be repeated to get the hydrangea flowers to turn pink and once they do turn pink, you will need to continue doing this hydrangea color soil treatment every year for as long as you want pink hydrangea flowers.
Gardening tips, videos, info and more delivered right to your inbox!
Sign up for the Gardening Know How newsletter today and receive a free download of our most popular eBook "How to Grow Delicious Tomatoes."
Heather Rhoades founded Gardening Know How in 2007. She holds degrees from Cleveland State University and Northern Kentucky University. She is an avid gardener with a passion for community, and is a recipient of the Master Gardeners of Ohio Lifetime Achievement Award.
- Amy DraissDigital Community Manager
-
5 Red Leaf Lettuce Varieties To Spice Up Your Garden Greens
Red leaf lettuce is not only tasty, but it is a beautiful addition to your salad. Before you plant one, learn which red lettuce varieties are healthier, crunchier, and tastier.
By Amy Grant
-
Full Sun Plants For Rain Gardens
Dear Earth hero: Go ahead and build a full sun rain garden. There are plenty of rain garden plants that will help capture and filter pollutants.
By Susan Albert
-
How To Get Hydrangeas To Bloom
When your favorite hydrangea is not flowering, check out a list of what it requires and make some changes that will make it happy again.
By Caroline Bloomfield
-
Best Underrated Plants: Forgotten Plants That Deserve A Second Look
We all love a showstopper, but there are plenty of unsung garden heroes that can elevate the vitality of your plot. We round up eight underrated plants you need to grow this year
By Bonnie Grant
-
5 Things To Know About Rose Mallow
Looking to grow Hibiscus moscheutos, also known as rose mallow? Here are five essential care tips you need to know.
By Amy Draiss
-
Easy To Grow Hydrangeas For Every Landscape
Want to grow hydrangeas but don't know where to start? Read on for no fuss, all thrills hydrangeas for any landscape.
By Amy Draiss
-
Growing Zinnias From Seed For Beginners
Even beginners can grow loads of beautiful zinnia blooms. Keep reading to learn how to grow zinnias from seed.
By Laura Walters
-
Care for Bulbs After Blooming
It's tempting to chop down the leaves after you bulbs have bloomed, but you have to resist this urge! Click to learn why.
By Amy Draiss
-
How To Grow A Peony That Lasts 70 Years
Peonies are gorgeous perennials that can last for nearly 100 years if properly cared for. Click to learn about growing long-lived peonies.
By Laura Walters
-
How To Grow And Care For Azaleas
Azaleas can be grown in nearly any garden, adding vibrant color in the spring. Click here for the best azalea growing tips and tricks.
By Amy Draiss