Why Is My Monstera Turning Brown? (And How to Fix It)


Indoor monstera plant leaves turning brown.

You are about to find out why your pretty monstera leaves are turning brown. It can be frustrating to see your Swiss Cheese plant turn brown.

However, all hope is not yet lost! You can still restore the beautiful look of your plant.

Monstera turning brown because of sunburn, low humidity, poor nutrients, over-fertilization, transplant shock, diseases, and extreme temperatures. Other possible causes are inconsistent watering, physical damage, and inadequate light.

If you’ve figured out what you are not doing right, you simply need to follow this article on how to fix the issue.

It’s important you act quickly to prevent your plant from serious damage.

You may also interested to find out why monstera is so popularOpens in a new tab. as houseplant.

Causes of Monstera Turning Brown

Your monstera plant requires a certain amount of care in order to stay healthy and remain beautiful.

Unfortunately, you might miss out on a few factors and realize that your plant is already turning brown and growing small leaves. However, you can easily fix this issue.

Keep reading to find out the causes and how to fix them.

Lighting issue

Your Monstera loves bright light, but not the rays of the sun. Placing your Monstera in direct contact with sunlight would lead to Sunburn.

Although Monstera is really tolerant of low light, it won’t give you it’s best with this condition. Your houseplant actually needs a lot of light to grow those big beautiful leaves you really admire.

Brown leaves could be a sign that your plant is not getting enough light.

How To Fix Lighting Issue 

  • Place your Monstera perfectly to get better results. Remember, your Monstera would do better in bright, indirect light.
  • If your room’s window is facing southwards, you can place your monstera next to the window but make sure you are using a sunblocking curtain. This should prevent your houseplant from burning.
  • Don’t make the mistake of keeping your plant outside except you have acclimatized it.

Improper Watering

It is important you regulate the watering schedule of your plants. Too frequent watering in too large quantities would cause the root to rot and make them stop working.

This could be the reason your Monstera leaves are turning brown.

While you might love your plants and love to give them a lot of water,  you have to be careful not to overwater.

Don’t get so worried about overwatering! Watering your monstera once a week is enough to keep it healthy and happy.

Underwatering your house plant would make your soil dry and the plants might get dehydrated to the point that they start to turn brown.

The key is making your Monstera soil moist but not soaked with water. So, it’s important that you water your plant adequately using a consistent pattern.

How To Fix Watering Issues

First, you need to know when and how to water your Monstera properly. 

How do I know if my Monstera needs water? A weekly finger test will let you know whether you should water your plant.

Dig your finger one centimeter deep into the substrate to determine the moisture content.

If you feel moisture then slow down your watering schedule. 

Alternatively, a watering meter can be very helpful. It would help you determine the moisture content of your soil.

This way you can determine when to water your plant.

How do I water my Monstera? Carefully draft out a roster for watering your plants.

Make sure you are consistent in order to prevent drought stress and overwatering.

Ensure that you drain out excess water from your soil. As this could lead to browning of leaves.

Also, make sure you used well drainage capacity soil for your monstera.

In addition, Monstera requires less watering in winter, you simply need to keep your plant in a warm place.

This is because most houseplants go dormant during this period. Read this article to know how to save overwatered monstera and how to water properly.

Temperature Issues

As a tropical plant, your Monstera is used to temperatures between 68–86 °F (20–30 °C).

A sudden change in temperature or exposure to extreme weather conditions can cause your plant to turn brown.

Your Monstera needs adequate temperature conditions to grow well. A drop in temperature would cause the growth of your plant to reduce drastically.

How To Fix Temperature Issue

  • Keep your plants warm in winter. You can totally move them to warmer spots if you notice your room is really cold. Don’t try leaving your plants in the conservatory over winter or in unheated sunrooms.
  • Avoid placing your Monstera plant in front of a heat vent or air conditioner. Also, do not place your plant near hot or cold windows.  Extreme temperatures can seriously damage your Monstera.

You May Also Enjoy: Why Are Monstera Leaves Curling?Opens in a new tab.

Low humidity  

Your Monstera plant has only known high humidity its entire life. Consequently, exposure to low humidity can make their leaves turn brown. 

Low humidity causes your plant to lose moisture through stromata the leaves. So, monstera tends to need more water than usual. 

Relative humidity between 50-60% is best suited for most of the houseplants.

How to fix low humidity

If you live in an environment with a dry climate, there are certain tricks you can use to prevent your Monstera leaves from drying up.

  • You can purchase a humidifier to create the perfect level of humidity for your plant. If you want maximum growth and massive beautiful leaves, your humidity should be around 60%.
  • Another method of increasing humidity is misting. To mist your plant, you simply need to spray water directly on your monstera leaves. You need to repeat this several times in a day to ensure optimum humidity. This is because the moisture created by misting only lasts a few hours.
  • Alternatively, you can change the position of your plant. Think of a place in your home with higher humidity and bright light. Oftentimes, our bathrooms have higher humidity. This is because of the wet environment created by the misty shower and sinks!
  • Grouping your plants or placing them on pebble trays filled with water can also be a good fix for humidity issues.

Over-fertilizing

Monstera plant leaves turning brown due to improper care

Over-fertilizing also leads to brown leaves on the Monstera. In fact, over-fertilization would cause your Monstera plant to display certain symptoms.

Your plant might display symptoms of lack of nutrition and excess nutrition at the same time.

Because excess fertilizer can cause damage to your root,  preventing your plant from being able to absorb nutrients and water.

So, your monstera can show symptoms like yellowing or browning of leaves.

How To Fix Over-fertilization Issue

  • First, it is important that you analyze how much you have been fertilizing previously. You can do this by checking for stakes of salt.
  • Now, wash your soil with a profuse amount of water in order to get rid of excess salt.
  • Avoid fertilizing your soil for the next three months to avert the situation.
  • Ensure that you pamper your plant with adequate lighting, watering, and humidity.
  • You can also consider repotting your Monstera. This should be seen as the last alternative as repotting can stress your plant.  

You May Also Enjoy: Why Does My Monstera Have Brown Spots? (And How to Fix It)Opens in a new tab.

Transplant Shock From Repotting

It’s exciting to see your monstera grow into a large size. Eventually, you have to repot since they can no longer stay in a smaller container. 

If you don’t transplant correctly, your houseplant might not thrive in its new home.

In fact, Monstera turning brown can be a sign that you transplanted wrongly and your plant now suffers from repotting plant stress.

Other reasons for transplant shock could be repotting at the wrong time, exposing the roots of the plant fora long time, repotting with a different type of soil, or changing position.

How To Fix Transplant Shock Issue

 If your plant is already suffering transplant shock, you can only fix the issue by giving the plant ultimate treatment.

  • Ensure that your plant has enough drainage holes. 
  • Remove all dead leaves and stems, this would allow new ones to grow.
  • Stop fertilizing your plant for some months. Fertilizing can cause your plantto even more stress.
  • Ideally, if you’ve moved your plant to a different position and it turned brown, it could be that your houseplant is not getting optimum light and humidity there. Simply take your plant back to the previous position it lived in before transplanting.
  • Ensure that you give your plants adequate water. Overwatering could damage your Monstera at this point.

Physical Damage

I know you love your Monstera, it might seem so cute for you to touch them every morning, but be careful not to cause physical damage to your plants.

This would eventually cause your monstera to turn brown. ( Ohh! You’re so guilty of this, I thought as much). 

Your monstera can also get hurt while repotting or changing placement. So be careful while doing this kind of stuff.

Another possible threat of physical damage is your pet. It sounds odd but your poet may be guilty of damaging this green beauty. 

How To Fix Physical Damage

  • Try not to touch your plants too often, especially the young ones. It could be hard, but try! 
  • Carefully follow the steps while transplanting. 
  • Make sure your pets can not reach to the placement of your monstera. In addition, you should keep in mind that monstera is mildly toxic to pets and also humans.
  • You can elevate the plant container to keep it away from pets.
  • Another way is to train your pets not to mess with the houseplants.

Diseases

Monstera turning brown could be a symptom of a disease. Actually, there are a number of diseases that can cause your plant to turn brown.

Eyespot disease: Brown leaves can be an indication that a window leaf is suffering from a fungal infection called eyespot disease (Spilocaea oleagina).

Anthracnose: This disease is also caused by fungi. Your plant can easily get infected with this disease if it has a wound. In this case, your plant will turn yellow first, then finally brown before it dies.

How to fix disease issues

  • Cut off the affected leaves with disinfected, sharp scissors.
  • Fungi thrive in overly wet conditions, ensure that you keep your foliage dry for some time to fix the issue.
  • Ensure that your plant gets adequate humidity. Low humidity facilitates fungal infection.
  • If you have other plants nearby, it’s important you check them for disease as well. This would help you get to the bottom of the problem.

Source: University of Florida/IFAS ExtensionOpens in a new tab.

Now you can easily get your plants back to its beautiful self. I tried to cover all the possible causes and solution so that you do have to worry about you monstera turning brown.

If you have any suggestions and experience please feel free to share. 

Arifur Rahman

I'm the owner of gardenforindoor.com. After completing my bachelor of science in agriculture, I'm serving as a civil service officer at the Department of Agricultural Extension, Bangladesh. I started Garden For Indoor to make your indoor gardening journey easy and enjoyable.

Recent Content