Why Do Hydrangea Leaves Turn Yellow?

Last Updated on November 7, 2022 by Stephanie

There is a typical issue of the leaves of your hydrangea turning yellow if you own one. Sometimes, you might try to alter the maintenance requirements in a random manner. However, you can make the situation worse by doing this.

In this situation it is crucial to identify the root of the problem immediately and then immediately commence treatment.

The majority of the time, the yellow leaves on hydrangeas can be caused by fungal disease or a deficiency of nitrogen, or chlorosis. This occurs when the plant isnt getting enough iron. To prevent your leaves turning brown, you must water them thoroughly every two or three times per week. To keep the hydrangea lush and green, give it Epsom salt and fertilizer that is nitrogen-rich.

If the leaves of your hydrangea become yellow You can easily bring back the gorgeous appearance of your Hydrangeas. Ill walk you through the steps.

Yellowing Types of Hydrangea Leaves

Before we get into the solution to the issue. Lets look at the different types of issues. There are three kinds of leaves that yellow in hydrangeas:

  1. Leaves turn completely yellow and then fall off
  2. Leaves turn yellow, and the veins turn green.
  3. Only the edges of leaves turn yellow

Leaves Turn Yellow Completely and Fall Off

If you experience this condition, you must be aware of several aspects:

  • waterlogged soil;
  • Low temperature and cold air;
  • absence of minerals in the development of buds and the flowering process.

Sometimes, the yellow leaves on the bottom could be caused by the normal process of aging. The lower leaves begin to turn yellow and then fall off.

Hydrangea Yellow Leaves Green Veins

Chlorosis is among the main reasons why hydrangea leaves change color, whereas the vein of the leaf remains green. This disorder is caused by iron deficiency. It is possible to help your hydrangea plants to improve their condition by adding iron chelated to your soil by adding water.

Only the Edges of the Leaf Become Yellow

The edges of the leaves of hydrangea turned yellow, what do I do? Particularly if the entire sheet was yellow, but just its edges.

Make sure you provide the plant with nitrogenous fertilizers that contain iron. In the absence of trace elements can cause the discoloration of the lower edges of the leaves.

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Hydrangea flowers pink close up

Causes and How to Fix Hydrangea Yellow Leaves

I have already discussed the causes that cause hydrangea leaves to turn yellow. Nowlets dive into the specifics of the reasons why hydrangea leaves change color and how to handle the issue.

Insufficient light or excessive Sun Exposition

Hydrangea is a plant that loves light however it is not tolerant of direct sunlight. The incorrect positioning of the pot could lead to the leaves turning yellow but also the total drying of the plant.

When choosing the location to live in be sure that it isnt a place that gets direct sunlight.


The UV radiation can be the most hazardous radiation in the 12 to 15 hour period of time frame.

The ideal place to be is in the region that is shady and sunny during the afternoon, and for not more than six hours.

In the event that it is not, the plant could suffer a severe sunburn. The leaves may show stains that appear semi-transparent. the leaves, but then they will turn dry and yellow.


Hydrangea is also not a fan of dark spots. It isnt comfortable when its shaded by tall plants with an abundant crown or larger shrubs.

Deficiency of Nutrients And Minerals After Flowering

Iron deficiency is among the main reasons that cause the leaves of hydrangea to change color. It is easy to detect this deficiency in nutrient by looking at the change in color on the leaf.

Iron is among the catalysts that are most crucial for chlorophyll production, and in the absence of it, leaves will lose their vigor green color.

If your hydrangea begins to turn yellow around the edges but the vein stays green, it is an obvious sign that your plant is deficient in iron.

From the beginning of spring until mid-summer, it requires regular feeds. In the spring, before it begins to flow, the plant requires more nutrients than usual.

A deficiency in nutrients, particularly iron and nitrogen can be a threat to:

  • Incomplete inflorescence formation;
  • The tips of the leaves are becoming yellow;
  • Drying out and the fall of leaves of greenery.

The answer to this issue is to apply iron-rich fertilizers. For instance iron chelates, manure, blood meal and compost have a high amount of iron for plants.

Water Logging Condition

One reason why the hydrangeas sport yellow leaves is because of the incorrect watering. Hydrangeas love water, however, they are not able to thrive in wet areas.

The root portion starts to rot because of the continuous dampness, and over time, the plant will die. In this instance it is recommended to stop watering or decrease the frequency of watering.

It is easy to safeguard the plant from water-logging issue. Create a drainage layer using broken bricks or stones in the bottom of the pot prior to planting or when transplanting.

Hydrangeas need to be watered regularly. How often you water is dependent on the external conditions. When the soil layer is dry you must moisten it.

Ive written an additional article about the best way to preserve your over the watered hydrangea. This article Ive explained step-by-step process to save your flowering hydrangea.

Soil Dryness

If the soil beneath the plant is always dry, the plants leaves begin to turn yellow before falling off.

In the beginning youll notice yellowish spots appearing on the edges and tips on the leaves. Then , it starts to turn. What should you do to help save your plant? Lets discover.

It is important not to allow your soils substrate to become dry. Make sure to water your plants by soaking it in warm water every day. Mulching can help keep the soils moisture for longer period of time.

Please contact us for more details!

You can make use of Shredded cones, conifers, wood chips to mulch.

The hydrangeas you plant in your garden will be away from trees. A close proximity could damage the plant. Because it wont have enough water to sustain and growth, it will begin drying out.

Drafts, Cold Winds and Temperature Changes

Hydrangea is a pleasant plant to be in areas in which there isnt any significant wind, like near the fence or wall. Since drafts can have a negative impact upon the plants. Leaves start to turn yellow and dry with time.

When combined with low temperatures this effect can be accelerated by several times, and the plant will die faster.

The ideal temperature in the house for growing hydrangeas can be found at 22degC (71.6degF).

If you increase this threshold the plates begin to become pale before turning yellow. The plant is not able to withstand abrupt changes in the external surroundings.

Just to make sure!

It is recommended to plant the species outdoors in the garden close to an enclosure or on the wall. This will shield them from drafts and wind.

The drafts that irritate hydrangeas can lower their immunity and can cause diseases. Plant this in cool, dark rooms throughout the entire autumn and winter time.

The ideal temperatures are +8degC (46.4degF). After hibernation, it is possible to bring the hydrangea back to its original location.

Soil Depletion

The most common cause for hydrangeas leaf turning yellow can be due to the absence of trace elements in the soil. Because of the deficiency of nutrients, plants immune system suffers severe attacks.

It is recommended to fertilize your pot soil with mineral fertilizers. Make sure to apply fertilizer prior to the time of planting. The soil must be acid-tolerant. The ideal range for hydrangeas is between pH 5.5 as well as 6.5.

Check that the soil is well-drained. It should comprise two components of soil and humus, the other portion of peat and sand.

It would be wonderful to add decomposed manure. In the months before spring, fertilize the soil of your hydrangeas by using urea fertilizer.


During the time of blooming and budding it is essential to feed your Hydrangeas at least three times.

Pot soils nutrients diminish as time passes. This is why its important to replenish it each year.

It is possible to do this through the application of fertilizers on your soil. The plant will bloom when new leaves emerge, it requires a large amount of nutrients.

If you dont provide nutrients, the plant may be unable to bloom next year. The fertilizer solution must contain superphosphate and potassium sulfide components.

Low Soil Acidity

Another reason that hydrangea leaves change color is due to that the substrate is alkaline. If the pH isnt adequate, then the leaves will turn yellow.

All hydrangeas are great in soil that is acidic. So, prior to planting, it is important to check this factor. Since leaves can be yellow because of low acidity.

The plant has healthy and robust shoots. You already know that this plant thrives in soils with the pH of 5.5-6.5.

If the soil you are potting isnt acidic, you can adjust the pH of your soil quickly.

To neutralize the soil to neutralize the soil, you can water it periodically by using a solution of citric or acetic acid (4-5 milliliters for 1L water). Mulching is a good option to keep soil moisture in place.

Diseases of Hydrangea

  • Chlorosis: The hydrangeas leaf color may change because of the infection of chlorosis. The symptoms are as follows The leaf plate changes color yellow and has vibrant green veins. To help the plant to get rid of this disease, it is necessary to make a solution comprised of 30 ml potassium nitrate and 10L water. Then, you should water the plant every week, over the course of 30 days.
  • Gray rot: If leaves of your plant begin to darken, curl and then fall apart in time. Your hydrangea is affected by gray rot. To fight this fungal disease, it is necessary to apply an 1% solution of Bordeaux. Bordeaux mixture.

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Root System Damage

The roots of the hydrangea are very fragile. It is susceptible to damage when transplanting or planting. Small cuts can cause an infection in the plant, drying out of its leaf structure.


The pruning of root systems can cause stunted growth and different diseases that affect hydrangeas.

So, it is recommended to take care to treat your root by using charcoal prior to transplantation. This will allow the root get free of any fungal or bacterial disease.

Why Do Different Species of Hydrangeas Leaves Turn Yellow?

Every species of hydrangea needs specific care and conditions for growth.

  • Panicled hydrangea: The gradual yellowing of the leaves in panicked hydrangea could result from improper maintenance. This kind of plant feels well in climates with a moderate temperature. The blooming season lasts for almost all summer long, from Junes beginning to August.
  • Bigleaf Hydrangea: Large-leaved Hydrangea is not just suitable for gardening, but also for an indoor garden. growing. The rules for watering, care, and soil composition are nearly identical to those of Geraniums. The flowers begin to appear in spring, and delights the gardeners with its blooms all the way through summer. The leaves of this type of hydrangea turn yellow, usually because of fungal diseases.
  • Tree Hydrangea: This is a simple kind of flower. It turns yellow mostly due to mistakes in care.

How to Apply Fertilizer When Hydrangea Leaves Turning Yellow

A deficiency in nutrients is among the primary reasons behind leaves becoming yellow. Therefore, you must provide the right nutrients to the hydrangea plant to keep it from turning yellow.

In spring, make an nitrogen-rich mixture to improve the green leaves.

In the summer, select an organic fertilizer that has most important nutrients like nitrogen and phosphorus as well as potassium to ensure that your plants are flourishing.

In the autumn months, the potassium-phosphorus content prepares hydrangeas to go into the winter months.

If your plant is suffering from iron deficiencies, you can water your hydrangea using Chelated Iron Solution.

Apart from the yellowing of leaves, there are other leaf issues that could be causing the yellowing.

Leaves Turn Pale (lighter)

The leaves of hydrangea can turn pale because of the presence of powdery dew. If you dont remove the affected areas promptly the disease could rapidly spread to the entire plant. In this instance it is recommended to apply an Fungicide.

Leaves Become Black

If your leaves show dry black spots, it means that the plant has been watered with insufficient water or subjected to intense sunlight. It is possible to bring the plant back to normal by altering the environment.

Leaves Twisted

The leaves of hydrangea are bent because theyve suffered from harmful parasites. In this instance you must conduct an extensive inspection and treatment for a rash of insects

How To Prevent Yellowing of Hydrangea Leaves

It is essential to provide high-quality conditions for growth to avoid the fading of your hydrangea plants. Here are some strategies to avoid the issue.

  • Choose a location to plant your hydrangea in order that it can remain in a light, diffused environment.
  • It is crucial to regulate the amount of soil moisture to avoid drying out or excessive moisture.
  • Use water that has settled at room temperature to water plants.
  • In the time of rain include wood ash beneath every hydrangea plant in the garden This will assist growers adapt their roots to harsh conditions.
  • Manage the amount of soil acidity and leaching;
  • In the early stages of flowering and budding, ensure your health and the condition of the plant by fertilizing it with a mix of nutrients;
  • Spray with Spray with 1 Spray with 1 % Bordeaux solution every month. This can help prevent fungal infections and bites by harmful insects.
  • Rejuvenate the hydrangea system by taking out the stems that are diseased and old.


Maintaining your indoor plants looking beautiful and healthy isnt at all challenging. It is important to take proper and timely take care of the plant and not ignore the preventative measures. It is essential to take steps to prevent different diseases and infections.

What solution are you planning to implement? Tell me your thoughts by leaving an email below. In addition, if you have any ideas, feel free to send them my way.



Went from an inexperienced gardener to a half-decent one over 10+ years. I cover anything from general indoor plant guides and lawn care, to succulents and flowers. Super happy to share my tips and tricks with you :)