You may wonder, “Why are my tomato leaves curling down?” This is actually a common problem in tomato plants. It can happen during periods of high heat and after heavy watering. This is caused by a variety of causes, including virus attacks, herbicide damage, and even drought.

While this may sound alarming, it’s not likely to harm the plants in the long run. Here are some tips to fix this common problem:

Why are My Tomato Leaves Curling Down: 12 Factors and their Solutions

Why are My Tomato Leaves Curling Down 12 Factors and their Solutions

It can be caused by a number of factors, including a lack of water. Overwatering will damage the plant’s roots and cause it to curl inward.

If your garden is experiencing high humidity, it’s likely that you have too little water, which will cause it to be stressed and make it vulnerable to pests. Another potential cause is herbicide poisoning.

Symptoms of tomato leaf curling vary greatly. However, there are some steps you can take to prevent leaf curling. While a lack of water can cause the leaves to spiral down, a higher-quality soil can cause the tomato to flourish in a healthy, productive way.

Lack of Water

A lack of water is the primary cause of this issue, and if it is the cause, you should try to remedy the situation. To treat this issue, you need to ensure proper drainage and watering. A good way to gauge the moisture content of the soil is by watching the temperature outside.

Wind Damage

Tomato leaves curling down is a common problem. It usually occurs after high or dry temperatures, and it can also be caused by wind damage or drought. To prevent the problem, it is necessary to fix it quickly.

To prevent it from recurring, it is best to plant plants with windbreakers, like fences or plants, in their growing area. It is also important to water the plants deeply at the root level, so they can recover from the stress.

Herbicide Residue

Herbicide residue is also a major cause of your tomato leaves curling down. While herbicides can be beneficial to the environment, they can also affect your crop.

A common cause of tomato leaf curl is the buildup of herbicide residue. This can happen if an area nearby is sprayed with weed killer and is in direct contact with your garden. It is important to monitor your plants to make sure they aren’t being damaged by drift.

Herbicide Drift

There is a good chance that your tomato leaves are suffering from herbicide drift. This problem usually occurs when a nearby field sprays chemicals that are carried into your plant by wind. When you notice this type of damage, the first thing to do is to pull your plant out and start it all over. However, if you cannot do this, you can try using fertilizer to fix the problem.

Broad Mite Damage

Sometimes tomato leaves curl down because of a serious disease caused by a broad mite infestation. A broad mite is a parasitic insect that can affect plants by infesting their stems and leaf tissues, and they can also be transported by whiteflies. If you notice the problem early enough, you can eliminate the culprit before it can cause major crop damage.

A small, translucent creature, a broad mite is a tiny, 0.2-mm insect that feeds on young leaf tissue. The disease can be fatal, affecting your yield and your plant’s health. The good news is that you can kill broad mites using insecticidal soaps or horticultural oil.

Fungal Infection

Fungal Infection

When your tomatoes start to curl down, the cause is likely a fungal infection. The disease is spread through wind, tools, and crop residue. It is not soil-borne but can damage your plants.

It can also reduce the size and quality of the fruits. While there is no immediate cure for the disease, it can be treated with some simple steps. If your leaves are curling down, it is likely a fungus.

Tomato leaf curl is a common sign of a bacterial canker infection, which can affect any variety of tomato. If the leaves curl downward, it may be a bacterial canker infection. A bacterial canker infection usually shows up on plants that have been injured.

In such cases, the affected leaves curl up. The lower leaves may also roll upwards. While there is no cure for this fungus infection, you can prevent it from becoming a problem by using a natural remedy.

Outside Temperature

Another common cause of tomato leaves to curl is the outdoor temperature. If the leaves of the plant are curved down, the outside temperature is a likely cause of the problem.

Tomato plants should not be planted too early. If you are unsure of the cause, consider using a weathervane. It will help you pinpoint the direction of the wind and the direction of the cold.


Leaf curl is often caused by the Gemini virus family, which can affect many different types of plants, including tomatoes. This type of disease is not contagious and can be quickly treated.

Infected plants should be removed, burned, or composted. The earlier you detect the condition, the easier it will be to treat. To get rid of the disease, you should identify the source and address it immediately.

Pest Damage

Tomato leaves curled down are an indication that various pests have attacked the plant. Most of the time, the problem is caused by aphids, which suck the sap out of the tomato plants’ leaves and stems.

Tomatoes are susceptible to numerous viral diseases, and this can cause curled leaves. However, this problem is not common and can be easily corrected.

If your tomato leaves are curling down due to pest damage, you must treat them immediately. Tomatoes are highly sensitive and should be treated as soon as you notice them.

Applying organic insecticidal soap to affected areas will help. If the infestation is widespread, it is best to destroy the plant. This will kill all the mites and will prevent the plant from developing more.

Excess Nitrogen

Tomato leaves might also curl down due to excess nitrogen – Why Are They Not Growing? Tomatoes have several causes of abnormal leaf curling. The most common cause is an over-supply of nitrogen. When a plant is deficient in nitrogen, the leaf will curl and die.

Too much nitrogen in the soil can result in dark green leaves. Too little nitrogen will result in a plant’s leaves curling inward.

If the leaves are too thick or are too young, the plant may be too young to produce fruit. A tomato plant that is not fertile will grow poorly and have a poor yield. It is important to test the nitrogen levels in your soil before planting.

Pruning Too Much

If you keep pruning your tomato plant too much, it will result in your plant becoming stunted and unhealthy. However, you can prevent this condition with a few simple steps. For example, tomatoes are less likely to develop flowers or fruits when you prune too heavily.

The effect on your tomato plant will be very small, but it will still be noticeable. If you see your leaves curling down, you might want to investigate the cause.

Micronutrient Deficiency

Tomato plants are very sensitive to lack of calcium, potassium, and magnesium, and the resulting discoloration of the veins makes them appear brown. Too little of these nutrients can cause the leaves to shrivel up, curl, or flop over. These problems can be easily remedied by adding more nutrients to the soil.

Micronutrient deficiency is also a major issue. Typically, a tomato plant needs a lot of nitrogen to sustain healthy growth and development.

Yellowing is a lack of boron or molybdenum. If you’ve seen your tomatoes curling, they are suffering from a micronutrient deficiency. The solution is to add plenty of fresh compost to the soil around your tomato plants.

Insufficient amounts of phosphorus in the soil can cause the leaves to curl downward. Despite how hard it is to diagnose, this condition can be easily remedied. By amending the soil every few weeks, you can prevent your plants from dying of water stress.

There are a few ways to prevent the tomato leaves from curling. First, maintain a good airflow. A lot of people think that a neighbor using a herbicide is to blame for the problem. You should contact the neighbor and ask them to stop using the herbicide in their area.


Besides pests, other factors that cause tomato leaf curling include micronutrient deficiencies. The main factor is you must keep the plants under observation.

Especially for plants, you delay taking action to cure your precious plant. It might be hard to recover them again. So, always take good care of your plants and stay alert.