If you notice that the leaves on your pepper plant are turning yellow then there are a number of potential reasons as to why this is happening in the first place. Furthermore, you must not only be able to identify the cause but also know what to do in order to resolve the issue.

In actual fact, at this moment in time we are going to look at 17 different reasons as to why this may happen just to make life that little bit easier for you.

  • 1. Issues with Not Enough Nutrients.

If your pepper plants are not getting enough nutrients then this can lead to those yellowing leaves. If there are not enough nutrients then the plant is unable to grow in the manner that it needs to and the most common cause is it not getting enough nitrogen. However, this is going to affect the older leaves first although low levels of iron and zinc can also cause this.

  • 2. You Have a Problem with Chlorine in Water.

If you have too much chlorine in your water and you are splashing this all over the leaves, then you may very well end up with them turning yellow before your very eyes. This is because of the damage that excess chlorine is going to cause to the plant although the problem is less of an issue if you just water directly onto the soil.

  • 3. You Give too Much Water.

Giving your pepper plants too much water is not going to result in you having larger fruit. Instead, you are going to cause all kinds of diseases in the roots as they become saturated. Pepper plants need things to be well draining and quite dry and if the roots rot then the nutrients are not going to get to the leaves leading to them turning yellow.

  • 4. The Temperature is too Cool.

Pepper plants are pretty specific when it comes to the temperatures that they are able to withstand and they hate if it goes too cold for an extended period of time. If it falls below60F for a few nights then the outcome is that the leaves turn yellow as the plant can basically die as a result.

  • 5. Too Little Fertilizer.

If you are guilty of not using enough fertilizer then the plants will be unable to get the correct nutrients and as we mentioned earlier this is going to lead to yellowing of leaves. Use a balanced fertilizer to make sure that they are getting everything that they need to avoid this problem.

  • 6. Be Aware of Potential Viruses.

There is always the possibility that those yellow leaves has been caused by a virus so you need to identify it in order to treat the problem as quickly as possible. The main ones to look out for include curly top viruses, mosaic viruses and spotted wilt as they can all lead to yellowing of leaves at different stages in the growth period.

  • 7. Think About Bacterial Leaf Spot.

Keeping with the idea of diseases being a cause, we can mention bacterial leaf spot as this is something that can commonly occur in pepper plants. You will notice yellow circular spots appearing on the leaves and if it is not treated accordingly then it is going to spread across the entire leaf. This takes less time than you think so really paying attention to the color of the leaves is important.

  • 8. Dealing with Wilt.

We mentioned this in brief earlier but it is so important we thought it deserved its very own place in our list. That problem is known as wilt and it can spell the end for your pepper plant as you know it. This is easy to spot because you will notice the growth of the leaves are stunted and the leaves in general are going to turn yellow. You might also be able to spot dead areas on the leaves.

  • 9. The Problem of Phytophthora Blight.

If you have never heard of phytophthora blight then it is best you get yourself acquainted with it. This is a type of fungus that can appear in the soil and then when you splash the soil with water it can get onto the leaves and start to cause damage. But here is the problem, it can stay in the soil so if you reuse it then the other plant will also become infected.

  • 10. The Problem of Southern Blight.

Another issue that you are going to have to potentially contend with that can lead to these yellow leaves is known as southern blight. Now, this is another common issue and it is yet another form of soil borne fungus that can attack the plant. Once again, it can spread in the same manner as the previous type of blight and it also leads to yellowing of the leaves.

  • 11. The Problem of Verticillium.

Verticillium does not just affect pepper plants, but in this instance it can be yet another issue that can ultimately lead to those leaves turning that horrible yellow color. Once more, it is a fungal disease that is sometimes also known as verticillium wilt and if you get this on your pepper plant then there is very little you can do to combat it.

  • 12. The Problem of Fusarium.

Staying with the line of viruses and fungal diseases that can affect your pepper plants leading to yellow leaves we have fusarium. Now, this might sound quite fancy by name but there is no doubt that it can cause a huge issue for your pepper plants. With this, a number of weeds actually hold this type of fungus and it is very easy for it to spread to your pepper plants. If you have this, then you need to destroy the plants and change the soil as it will hang around for some considerable period of time.

  • 13. The Problem of Mosaic Viruses.

There are several types of mosaic viruses that can affect your pepper plants so we have just grouped them together under the one banner. Now, this is not only going to turn the leaves yellow but it will also stunt growth and there is a good chance that it is going to kill the plant eventually. Once again, you are often best to just remove the infected plant to stop it from spreading to others that you are growing in the same area.

  • 14. Infection by Mites.

You might be wondering how an infection of mites on your pepper plants could lead to the leaves turning yellow, but it is easier to understand once you discover what they are going to do to the plant itself. The problem with these mites is that they love the sap that is inside the leaves and that is like the blood of the leaf. If you remove that blood, then the leaf is going to die and the first stage of that is going to be them turning yellow. Check out for signs of mites to deal with it immediately.

  • 15. Infections by Aphids.

Aphids are known to affect a wide variety of plants and in this instance they are going to love your pepper plants if they are left to their own devices. Once again, they are going to remove the goodness from the leaf and that means it is unable to grow in the manner that it should. Just as with the mites, if you remove that goodness then you are going to have a dead plant on your hands.

  • 16. The Issue of Psyllids.

Psyllids are very destructive as they are also going to feed off the sap that is in the leaf depriving it of the various nutrients that it needs in order to stay green and to grow normally. They may not be as well known as some of the other pests that can affect pepper plants but there is no doubt that they are more than capable of being just as destructive. These lice can be in huge numbers and destroy a plant quite easily.

  • 17. A Problem with Resistance.

Finally, we have to talk about something that is going to make you stop and think for a moment as we are going to mention the problem of resistance and the fact that this can also cause those leaves to turn yellow. What we mean by this is that there are various varieties of plants that have been grown to be resistant to various diseases and yet this can also cause its own problem. With this, they can be more resistant to insecticides and the leaves can be damaged and turn yellow as a result, so think about what you have been doing with the plant.

Now, we said that there are also a number of things that you can do in order to help avoid this becoming an issue and we are going to look at five methods that you really should consider employing for the sake of your pepper plants.

How to Help Those Yellowing Leaves.

  • 1. Be Careful with Your Watering.

The first thing to mention is the very real need for you to be careful with your watering. You see, if you under water the plants then it can lead to them dying. At the same time give them too much and you are going to encourage different diseases and the roots to rot leading to the same end result. Finally, if you water all over the leaves and the soil then microbes in the soil can end up being sprayed all over as well as fungus appearing on the leaves.

Be careful with your watering and you will reduce the chances quite considerably.

2. Make Sure They Have Adequate Lighting.

Plants need light in order to then convert it into energy and that is what gives them their green leaves. If you reduce the quality of the light as well as the length of time that they have it then it is going to increase the chances of the leaves turning yellow. Furthermore, if the plants are weaker because of light issues then there is more of a chance of them developing diseases.

  • 3. Always Use a Quality and Balanced Fertilizer.

On several occasions we mentioned that there was a need to make sure that the plants were getting the correct nutrients and the best way to do that is by using a balanced fertilizer. This means the plant is getting the correct levels of nitrogen, phosphorus and potassium and this has been shown to make the plant healthier and less likely to see those changes in the leaves.

  • 4. Work on Preventing Disease.

As there are so many different types of disease and viruses that can cause the leaves to turn yellow, then it makes sense to focus on trying to prevent it as much as you can. This is going to involve you using insecticides and keeping a close eye on your plants for any signs that there is an issue before it can really take hold. Create the perfect growing conditions and there is less chance of disease appearing.

  • 5. Work on Preventing Pests.

Finally, so many different types of pests can also cause the leaves to turn yellow on your pepper plants, so just as we recommend that you have to prevent disease the same can be said about preventing pests. There are different ways to do this including companion planting so invest some time in learning about this as it will certainly be worth the effort.

So, those are the 17 different reasons that we have identified that could cause the leaves on your pepper plants to turn yellow. In addition, we have also provided five different methods to resolve the issue that are known to work. However, the key is in identifying the issue as quickly as possible to then allow you to take the appropriate steps in order to rectify the problem before it becomes too severe.