Yellow Leaves on Hydrangea – How to Fix

Hydrangea leaves show us through their changes that they may have something wrong with them. Interpret their symptoms, we help you! Learn all about yellow leaves on hydrangea.

Different factors influence the health of our Hydrangea plants. In this guide, we are going to talk about those that are related to the natural environment in which they are found.

Yellow Leaves on Hydrangea

When Hydrangea leaves turn yellow, we should normally monitor the watering, the acidity of the soil, and the fertilizer that we are giving to the plant in our garden or its pots.

yellow leaves on hydrangea

Chlorosis in Hydrangeas Causes Yellowing of The Leaves

The hydrangea indicates that something is happening to it when it shows its leaves changing from green to yellow.

At this moment we know that the plant may be suffering from chlorosis, caused by a sudden loss of soil acidity or very calcareous watering (significant increase in pH).

hydrangea white flower

Why Do Hydrangea Leaves Turn Yellow?

Yellow Hydrangea leaves caused by chlorosis represent a significant loss of the ability of the plant’s roots to assimilate iron (Fe) from the soil.

The green leaves of Hydrangea, and plants in general, are closely linked to the assimilation of nutrients and minerals from the soil. Thus, any change in leaf color may indicate pathophysiology; in the case of chlorosis, it is a gradual change from green to yellow.

hydrangea leaves leaf

How to Solve the Yellowing of Hydrangeas Leaves

To solve the change of color of the leaves of the hydrangea, we have to discard the options mentioned above.

So, first, we will check the acidity of the soil as the most important indicator, and then the type of fertilizer we are using to see if it is the correct one.

You should check the pH of your hydrangea with a pH meter like the one we use and it doesn’t need batteries, plus it has other functions that are very useful with plants (Order it here).

Remember that the colors of most hydrangeas depend on the balance between the acidity of the soil and the fertilizer used in their development and flowering. In general, it is advisable to use a specific fertilizer for acidic plants, but other types of fertilizers are acceptable as we saw in the article “How does the color of Hydrangeas vary according to the pH of the soil”.

The plant overcomes an episode of chlorosis thanks to the contribution to the soil of a specific product that provides the Iron (Fe) that it lacks, in a state easy for its absorption by the roots. This product is known as Iron Chelate and is usually administered by irrigation with non-calcareous water.

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yellowing of hydrangeas leaves

Other Factors That Can Cause Yellow Leaves on Hydrangea

When we buy a Hydrangea plant and place it in our garden, on the patio, or the terrace, we usually transplant it and place it following a very basic criterion: “Hydrangea is a shade plant”.

In most cases, it receives enough light and we have not been wrong, but sometimes, the amount of light the plant receives is not enough.

Hydrangea leaves can turn yellow due to insufficient light conditions. In this case, the solution is usually very easy, since it is enough to change the location of the plant.

hydrangeas flower leaves
About Henry Morgan

We are the Morgan family, Henry, and Morgan, both agronomists from the University of Michigan, where we met. We are experts in putting our hands in the soil and developing organic foods and improving production processes for decades. Likewise, we have worked for companies such as Mondelez International, BASF, Monsanto, etc. currently in our role as science writers for as well as advisors in promoting large scale food growing in urbanized areas. In this website, we share what we are most passionate about, gardening and farming. Enjoy and see real photos on our website.