5 Reasons Why Your Plant's Leaves Are Turning Yellow - Backyard Boss
We are reader supported. External links may earn us a commission.

5 Reasons Why Your Plant’s Leaves Are Turning Yellow

We all know that plants are important. They produce the oxygen we breathe and the food we eat. They also play a vital role in the water cycle, helping to purify our air and water. So, when our plant leaves start turning yellow, it’s natural to worry.

There are several reasons why your plant’s leaves might be turning yellow. Here are five of the most common reasons for yellowing leaves on plants:

Pest infestation

flea beetle on a leaf
Image Credit: gbohne via Creative Commons

Pest infestations are one of the most common causes of yellowing leaves on plants. These infestations can come from a variety of pests, including caterpillars, aphids, and beetles.

If you notice that your plants are starting to turn yellow, it is crucial to act quickly. You will need to carefully inspect your plants to identify which pest is causing the problem. Once you have identified the pest, there are several methods you can use to get rid of it.

One popular method for getting rid of pests on plants is using insecticidal soap or other pesticides specifically designed for this purpose. Be sure to read the instructions carefully before using any pesticide, as you don’t want to harm your plants accidentally.

Another method that can be effective is removing the pests by hand. IT can be a bit time-consuming, but it is often the safest and most gentle method.


leaves of the plant disease
Image credits: rm211171 via Canva

Diseases that cause the yellowing of plant leaves are a common problem for gardeners. Several diseases can affect plants, and they all have different causes and symptoms. In general, the yellowing of leaf tissues is caused by nutrient deficiencies or fungal pathogens that infect the plant tissue.

One common type of disease that causes yellowing in plant leaves is called septoria leaf spot. This disease is caused by a fungus called Septoria tritici, which produces small brown spots on the leaves of susceptible plants. The spots often start as circular patches, but they can eventually grow to cover large areas of the foliage. As the disease progresses, the affected parts of the leaf will start to turn yellow, and the leaves will eventually drop from the plant.

Another type of disease that can cause yellowing in plant leaves is called chlorosis. This condition typically occurs when a plant is lacking certain nutrients, such as nitrogen or iron. Symptoms of chlorosis include yellowing along the veins of the leaves, which may become pale or even white over time. The affected parts of the leaf tissue may also develop brown spots or areas where portions have started to die.

If you are concerned about yellowing plants in your garden, there are several steps you can take to prevent or treat these diseases. One important step is to make sure that your plants get adequate sunlight, water, and nutrients throughout the growing season. You may also want to consider using fungicides to prevent or treat fungal diseases and insecticides to control pests that could spread diseases.

Environmental Stress

Image credit: Vadim Kaipov via Unsplash

Leaves turning yellow is one of the most common environmental stressors on plants. Many factors can cause leaves to turn yellow, including nutrient deficiencies, water stress, temperature extremes, and pests or diseases. While some leaf yellowing is normal and not a cause for concern, severe or prolonged yellowing can indicate a problem that needs to be addressed.

Water stress is a common cause of leaf yellowing. Plants need a certain amount of water to maintain their health, and if they are not getting enough water- or too much- their leaves will start to turn yellow. It can be caused by several factors, such as not watering often enough, using water that is too cold or hot, or evaporation due to high winds.

Temperature extremes can also cause leaves to turn yellow. If the temperature is too hot or too cold, it can damage the plants. This is most common in the spring when the weather is changing rapidly, and plants are not yet acclimated to the new temperatures.

Nutrient deficiency

Yellow plant leaf in the sun
Image credits: Dominik Scythe
via Unsplash

When it comes to the colors of leaves on plants, yellow is often associated with nutrient deficiency. While numerous factors can lead to this problem, lack of nutrients is a common cause.

Many different nutrient deficiencies can affect plants, but one of the most common is chlorosis. This condition occurs when there is a deficiency of chlorophyll in the leaves, causing them to turn yellow. Chlorosis can be caused by several factors, including poor soil conditions, lack of sunlight, or even too much nitrogen in the soil.

Another common type of nutrient deficiency that causes leaves to turn yellow is carotenoid deficiency. Carotenoids are responsible for giving plants their characteristic yellow, orange, and red colors. When there is a lack of these nutrients in the soil, leaves will start to turn pale yellow or even white.

If you are experiencing a nutrient deficiency in your plants that cause leaves to turn yellow, there are steps you can take to help them recover. The first step is to identify the underlying cause of the problem and address it accordingly. For example, if poor soil conditions are contributing to chlorosis, you may need to add more fertilizers or organic matter to improve the plant’s growing environment.

When it comes to nutrient deficiencies, prevention is always the best cure. By taking steps to ensure that your plants are getting all the nutrients they need, you can avoid problems down the road and keep your garden looking its best.


Potting Bench from Wooden Pallets
Image credits: thepaintedmill via CreativeCommons

Repotting is a process involved in growing plants. It involves moving the plant from one container to another, usually a larger, one. This helps to encourage new growth in the plant by introducing it to fresh soil and providing it with more room to grow.

One of the most common reasons for yellowing leaves on houseplants is poor drainage in the pot. If the soil remains wet for too long, it can lead to rotting roots and yellow leaves. To prevent this from happening, make sure you have a pot with good drainage holes so that excess water can flow out easily. You may also want to consider planting your plant in a larger pot if it is starting to become rootbound. This will give it more room to grow and allow for better drainage.

In Summary

While leaf yellowing is often not a cause for concern, it can sometimes be symptomatic of a more serious problem. If you are unsure of what is causing your plants to exhibit signs of leaf yellowing, it is best to consult with a professional. In most cases, treating leaf yellowing early will prevent more serious problems down the road and keep your plants healthy.

Have you ever dealt with this issue before? Do you have any tips or tricks that could help other gardeners? Reach out to us and let us know!