Sumo Gardener

What Are The Reasons for Having Some Hibiscus Yellow Leaves?

Are you wondering why there are hibiscus yellow leaves in your hibiscus plants?

Are you worried that they might make the other leaves turn yellow?

Then knowing the reasons for having some hibiscus yellow leaves in your hibiscus plant is essential, for you to know if it’s worth worrying or not.

Typically, when a plant it under stress, which is usually from the environment, diseases, or pests, they tend to react differently. Just like any other plants, Hibiscus can give signs of their discomfort through their leaves.

Typically when a hibiscus leaf turns yellow and starts dropping, these are clear signs that they are experiencing something that is stressing them. Some of the other stresses are too much munching and even improper fertilizing, and watering can stress them.

If you are noticing hibiscus yellow leaves in your hibiscus plants, then knowing the most common reasons, why this happens is essential.

Pests Can Turn Leaves Yellow

nematode root knot

One of the most beautiful parts of a hibiscus is their flowers. The reason behind this is because they are colorful and large, which is very inviting to pollinators and as well as to unwelcome insects, including root knot nematodes, and scale insects.

For people who don’t know, scale insects are feeding on plants by piercing their stylets into the soft tissue of the plant. The stylets will then act as straws to help the sap be drawn up.

A smaller number of scales may have little to no effect to your hibiscus, but once they start to multiply, the leaves will start turning yellow and prematurely drop on the ground.

The nematodes, on the other hand, are worms that look like eels that are small. They usually feed on the plant’s roots. They will then cause knotty galls, which will act to impair the function of the plant. This will then turn the leaves to start wilting and turn yellow.

Sensitivity of Hibiscus to Stresses

Sensitivity of Hibiscus to Stresses

There are 200 species of Hibiscus, and they are categorized as hardy varieties and tropical ones. Most of the species can survive in Zones 9 and 10, according to US Department of Agriculture, while some other species like Swamp Hibiscus and Rose Mallow can survive in zone 5.

No matter what type of species you have, always put in mind that they are all sensitive to environmental stress, diseases, and as well as pests.

Influences of the Environment

Hibiscus plant grows

Hibiscus plants have the ability to respond quickly to abrupt changes in the environment, including air moisture, soil, fertilizer application, and as well as temperature.

In fact, whenever the days start to become shorter, and the temperature becomes colder, these will all trigger the leaves to turn yellow and dropped prematurely.

Another thing that you need to know is that the Hibiscus plants do not have the ability to tolerate drought since they need to thrive in moist soil. Swamp Hibiscus can grow in conditions that are boggy, which means that they can grow at the edge of the water. But the majority of the species need a soil that can drain well.

Now for warmer climates, Hibiscus need to be watered regularly to ensure that the moist of the soil be maintained. If you let the soil become too dry, the leaves will start turning yellow. Adding a liquid fertilizer will also help.

Leaves Turning Yellow Maybe Due to Diseases

Leaves Turning Yellow Maybe Due to Diseases

Diseases tend to spread all throughout the plants even before the leaves start to turn yellow. Typically the fungal diseases of Hibiscus are because of Phyllosticta, Cercospora, and Cladosporium species.

These species can cause the leaves of the Hibiscus plants to become yellow. They can also create halos or can cause discoloration on the entire leaf before it even drops off the plant.If the environment is too humid due to rainfall or irrigation systems, the fungal will be allowed to develop and spread.

Fortunately, there are a lot of treatments that can be purchase and be done with the plants. But put in mind that once the diseases are present, it may be hard to manage them.

When using a fungicide, it would be best to read the labels if it is safe for the plants that you have, since there are Hibiscus species that are sensitive to chemicals.

Lack of Light from the Sun

Hibiscus Lack of Light from the Sun

Another reason why the leaves of the Hibiscus are turning yellow is that they lack sunlight. But exposing them to too much sunlight can cause for them to get sunburned. This will, in turn, make the leaves turn yellow or have splotches of white.

These are the reasons why you have seen Hibiscus yellow leaves in your Hibiscus plants. For you to be able to get rid of them, make sure to correct the main problem and keep your Hibiscus well maintained to avoid diseases and such.


About the Author Ann Katelyn

I'm Ann Katelyn, Creator and Chief Author of Sumo Gardener. Since I was a child I've always been fascinated with plants and gardens, and as an adult this has developed into my most loved hobby. I have dedicated most of my life to gardening and started Sumo Gardener as a way to express my knowledge about gardening with the hope of helping other people's gardens thrive.

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