Why Are My Blue Hydrangeas Fading?

by Shelley Ryffe
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hydrangea leaves fading

Why are my blue hydrangeas fading? One of the most significant causes is direct sunlight which affects the hydrangea plant very much as it can’t consume the extra heat inflammation from the sun. Another common reason can be the pH level.

Let’s take a deep look at some of the major reasons behind the hydrangeas fading from blue depicted below.

Why Are My Blue Hydrangeas Fading

Lack of waterProvide adequate watering
Pests creating stressesUse pesticides rich in potassium less in phosphorus
Direct sunlightPlant it somewhere distant from the sun or in such a place where direct sunlight won’t come
Acidic soilAdd aluminum sulphate to the soil to enhance the pH of the soil
Flower transplantationLet it adapt to the new place and grow naturally


One very effective reason why are my hydrangea leaves fading is pollination. As the plant which is about to be pollinated, generally attracts the pollinating insects.

The hydrangea flowers are often stressed because of the pests. As a result of pollination, the blue hydrangeas begin to fade.

The soil needs some fertilizers to sort this out. You can use pesticides that are rich in potassium less in phosphorus.

Flower Transplantation

Suddenly, after the transplantation of your hydrangea plant, you may notice that the flowers are getting faded.

Don’t worry. It’s actually the effect of your transplantation. It will take time to cope up with the new circumstances.

If the hydrangeas fade because of transplantation, give them enough time and water to cope up with the new condition of the circumstances.

Acidic Soil

One very noticeable reason behind the fading of your hydrangeas is the acidity of our soil.

In addition to that, if the pH of your soil moves to 6.00 or above, it will not stay blue any more.

There may sometimes happen that your soil has a pH of 5.2-5.5 suitable for the hydrangeas, and even it prevails in such a place where direct sunlight is not visible.Well, it can occur because of the old age of your hydrangea plant.

To prevent solid acidity for which the hydrangea flowers have begun to fade, add aluminum to the soil because aluminum compounds play a vital role in shaping the color as blue.

This is considered as the best solution regarding how to turn hydrangeas blue naturally.

Direct Sunlight

Usually, hydrangea plants are not sun resistant enough. So, if it is planted in such an area where sunlight comes out directly, the flowers will soon start fading.

Plant the hydrangeas in such a place where direct sunlight doesn’t fall. Rather, plant them in such a place where sunlight will slightly come without affecting the plants.

Lack of Water

Some hydrangea plants do not get enough water. As a result, the hydrangeas begin to fade away. Sometimes, overwatering may also cause your hydrangeas to fade soon.

Provide an adequate amount of water. Don’t water a lot as an over-watering state may also cause hydrangeas to fade.

A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

Why do blue hydrangeas lose their color?

Because of excessive sunlight falling directly on the hydrangeas, it may result in fading away. In addition to that, so much watering or less watering state may happen to lose their color.

How do I keep my hydrangea blue?

Firstly, you have to plant your hydrangeas in such soil, which has 5.2-5.5 pH. You can lessen the rate of ph in your soil by using soil acidification substances in case of the soil is more alkaline. Also, you can use fertilizer has less phosphorus and a high amount of potassium.

How do I get the color of my hydrangea back??

Basically, the pH of your hydrangeas decides the color of it. For getting your hydrangeas color back again, you should test the pH of your soil and then plant accordingly. pH of 7.0 or above causes the hydrangeas to turn pink or red, whereas pH in between 6 and 7 turns bluish-pink.

Will blue hydrangeas stay blue?

Surely, they will. But for that, there lies a condition. And the precondition is the pH should be between 5.2-5.5. However, to let your blue hydrangeas remain blue, you must sprinkle elementary sulfur to downgrade the pH to 5.5.

Will vinegar turn hydrangeas to blue?

Yes, they can. If your hydrangea is pink and the soil inside it is planted is alkaline, mix some apple vinegar and water with it as it is the most suitable treatment for all types of flowers, especially the hydrangea flowers.


Hydrangeas are the symbol of purity to most gardeners. So, follow the instructions given here and do so accordingly. Here are compact details including the reasons and solutions regarding why my blue hydrangeas are fading.

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