Brown Spots on Monstera [Causes and How to Fix It]

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Monstera is an evergreen plant from the tropical wines and shrubs of Central America. Their natural leaf holes are well established. It purifies the air and moisturizes the air. 

They don’t take much treatment to remain safe.

 But-

There is a question that is just killing you- why are there brown spots on your Monstera

For instance, direct and harsh sunlight will cause Monstera leaves to turn yellow and eventually brown spots. If you water your Monstera before the soil dries, the leaves will turn brown. Too much fertilizer can also contribute to your plant’s leaves turning brown.

Now, my friend, we’re just getting started, and there’s plenty more to come-

To help the plant, first identify the source of the problem. As a result, we’ve explained each clarification and possible solution.

Continue reading if you want to save your Monstera plant!

5 Reasons Why There Are Brown Spots On Your Monstera?  [Along with Solutions]

monstera has brown spots
source: https://www.houzz.com/

We understand how disappointing it is-

It’s disturbing to see your prized Monstera plant suffer, mainly since the cause is most likely your poor choices and carelessness.

If you don’t properly care for your plant, your slight mistakes are the reason it’s sick right now!

We can, however, assist you in overcoming this!

We have outlined your mistakes and their remedies to assist you-

1. Poor Quality of Waterwater pH tester

Slow growth and poor esthetic quality of the water may result in brown spots and, in some cases, the plant’s gradual death.

Water quality may refer to the chemical, microbe, or physical properties. If you have a private well or spring water, you must be concerned with all three. However, chemical issues are the primary concern for those that use municipal water to develop plants.

Water aids a plant in the transport of vital nutrients. Nutrients are derived from the soil and used by the plant.

On the other hand, high soluble salts can cause direct root damage and interfere with water and nutrient intake. Salts may accumulate in plant leaf margins, causing the leaves to have brown spots.

Chlorine, which certain civilizations use to kill bacteria that cause disease, is toxic to plants. Plants thrive in soil pH ranges of 5.0-6.0, and higher pH levels may be an issue in municipal water, especially for acid-loving plants like citrus.

There is “strong” water with high mineral concentrations in some areas. Since these are deficient minerals for your plants, you should stop using hard water.

Solution

Water quality is measured by testing several properties.

Temperature, acidity (pH), dissolved solids (specific conductance), particulate matter (turbidity), dissolved oxygen, hardness, and suspended sediment are examples of these.

Each shows a different aspect of a body of water’s health. If you use rainwater, bottled water, or purified water, you can remove chlorine, fluoride, and pH. Obviously, the cost and convenience of these choices differ.

Enable the water to sit on your plants for 24 hours if you sense chlorine.  You may also use a water pH tester before using it for your plants.

2. Insufficient Humidity humidifier

Humidity is one of the most important factors to consider when growing a Monstera Plant. Monstera plants thrive in low relative humidity (less than 50%). As a result, they can perform in environments such as homes and workplaces.

The issue occurs when the ambient air becomes drier. The moisture content of the plant is rapidly depleted. If that amount of water is not replaced, the leaves can wilt and brown. That is why, in addition to sufficient soil irrigation, maintain appropriate humidity.

Solution

  • spray

With a simple spray bottle, you can spray the air around your houseplants and directly on the plants. Some moisture will vaporize directly, raising humidity, while most will fall on your plants’ leaves and surrounding surfaces.

  • Humidifier

A humidifier powered by electricity may also be used. These can be small and discreet, and they can be turned on and off to create the ideal amount of humidity in a room for you and your plants.

  • Pebble tray

In an otherwise arid climate, a pebble tray is a simple way to increase local humidity for one or a few plants. Place your houseplant pot on top of the pebbles to keep it dry and out of the water.

3. Too Much use of FertilizerJulyPanny Soil pH Meter

Now, too much fertilizer use is the first reason why the plant has brown spots on leaves. 

A Monstera plant prefers a pH level of  6-7. The brown spots on leaves mostly appear due to the greater pH level in the soil. 

So, if a plant lacks this nutrient-

They’ll stop growing, and their leaves will brown spots. Moreover, they’ll simply die if you don’t act quickly. 

How can you be sure there is being used of too much fertilizer? 

Stunted growth, dried or burnt leaf margins, wilting breakdown, or plant death are all signs of over-fertilization. The most severe threat to fertilizers is “burning.”

Fertilizers contain high amounts of various salts, and humidity from their sources can be extracted using a process known as reverse osmosis.

When the surface content of salt is greater than that of the plant’s soil, and the plant is at risk of chemical burning and dehydration, reverse osmosis occurs.

Just read the instructions of the kit and test your soil. This tool will let you know how much of the nutrient is missing in no time. 

Solution 

How to save the Monstera plant? 

To be honest, it’s not that hard to turn the situation back to normal. Therefore, just follow our lead-

Firstly, remove the affected leaves. We suggest cutting the leaves where their stems have begun. This way, you can prevent damaging the plant’s tissues.

Once you’ve discarded the brown spotted leaves-

Grab yourself a soil testing kit. Which will help you determine how much fertilizer you might need to add.

We’ve mentioned these tools-

Soil test kit How to use
JulyPanny Soil pH Meter
  • Push the switch to the humidity, pH, or weak position.
  • Insert the probe into 2-4 inches of soil (2/3 of the probe).
  • Adjust the position of the probe until the pointer on the dial slightly swings.
  • After 10 seconds, please pay attention to the moisture/pH value in the dial.
  • Remove the probe from the soil and wipe it clean after each use.
Bluelab PENSOILPH pH Pen for Soil Take pH readings as follows: 

  • Remove the storage cap/dibber and insert the probe tip into the soil solution sample. 
  • Turn the Soil pH Pen on. Wait for the reading displayed to stabilize to a constant value. 
  • Record the reading.

4. Insufficient & Harsh  Lighting & TemperatureLED Grow Light for Potted Plants

IUnsatisfactory lighting and temperature will slowly destroy your plant. These unsanitary living conditions are not only to blame for brown stains on trees. But also Root rot in Money Plant

It is safest to cultivate your monstera plants in partial or complete shade. Place your Monstera in a position that receives medium to bright shading.

Let lots of natural light in, so eliminate direct sunlight as far as possible. Leggy development is possible because it is tolerant of low light.

Temperature

The plant likes average room temperatures ranging from 68 to 86°F. Since it is believed to have originated in rain forests, the plant would be at home in a similar tropical and rainy climate.

Too much heat can cause the leaves to have their internal liquids dried out. Plants grown at consistently high temperatures tend to have brown patches on their leaves.

Solution 

For your comfort, we’ve mentioned great LED grow lights for Monstera plants-

LED grow lights Specification
LED Grow Light for Potted Plants
  • Color White
  • Style Modern
  • Light Source Type LED
  • Power Source AC
  • Material Metal
Grow Light Plant Lights for Indoor Plants
  • Color Blue/Red
  • Style Modern
  • Light Source Type LED
  • Power Source AC
  • Shade Material Wood, Metal, Polyvinyl Chloride, Aluminum
EMMMSUN Grow Light, 45W LED Grow Light
  • Color Black
  • Light Source Type LED
  • Shade Material Metal
  • Finish Type Painted
  • Switch Type Push Button

Now, before placing the plant under the light, check the temperature of that spot. If the temperature matches with the ideal one, you’re all good!

5. Infestation of InsectsBonide (BND95349) - Insect Control Systemic Granules

Insects are most likely to blame for those brown spots on leaves. Since they have a reputation for sucking the juice from the leaf tissue. As a result, a plant’s leaves lose chlorophyll.

Spider mites, aphids, and thrips are now the most common pests around your Monstera plant. Since these three are crazy about Monstera.

Solution

The treatment is straightforward! And that is with a pesticide derived from plants.

You will not harm the plant in this manner. However, you will be able to get rid of the insects. We recommend applying rubbing alcohol to the affected area.

You can also use these insecticides on your plants.

Insecticides Specification
Bonide (BND95349) – Insect Control Systemic Granules
  • READY TO USE 
  • PEST CONTROL 
  • NO SPRAYING 
  • FOR NON-EDIBLE PLANTS
  • HOW IT WORKS 
BAYER CROP SCIENCE 701290B Insecticide
  • 3-in-1 FORMULA: Insect, disease, and mite control for use on roses, flowers, shrubs, and trees
  • INSECT KILLER: Kills Aphids, Spider Mites, Japanese Beetles, Caterpillars, and more
  • DISEASE CONTROL: Fungicide controls Black Spot, Powdery Mildew, and more
  • RAINPROOF PROTECTION: Systemic rainproof protection lasts up to 30 days
  • COVERAGE AREA: Treats up to 45 plants
  • RESTRICTIONS: Not for sale in NY, CT, MD & VT
Harris Neem Oil
  • 100% Cold Pressed & Unrefined 
  • Cosmetic Grade 
  • Organic Gardening Uses 
  • Mix with Lotions or Shampoos 
  • Satisfaction Guaranteed

FAQs

Question: How do you get rid of brown spots on plants?

Answer: Water-soaked black and brown spots on plant leaves and stems often indicate a fungal or bacterial disease. Change the watering schedule and don’t let plants remain in standing water.

Question: Should I cut off dying leaves?

Answer: Remove brown and dying leaves from house plants as soon as possible, but only if they are more than 50% affected. The remaining healthy foliage receives more nutrients by removing these leaves, and the plant’s appearance improves.

Question: Why are my Monstera leaves turning brown? 

Answer: The most common reason for brown Monstera leaves is insufficient water. If you don’t provide enough water, the plant will start drying out. And this will eventually lead it to have brown leaves. 

Question: Does the Monstera plant grow fast?

Answer: Monstera has trailing leaves that are oval, smooth, and muted-to-bright green. They usually grow to be about a foot to a foot and a half long, but they can grow much longer in ideal conditions.

Take Away

Now, those are the reasons why my Monstera leaves have brown spots. But by following the solutions we have mentioned, you can easily save your beloved plant.

So, how do you like our review?? 

Share your answers and thoughts with us by leaving a comment. Good luck saving your precious Monstera plant!