Why Do Peace Lily Leaves Turn Black?

Peace Lily ( Spatiphyllum) is a favorite for those who love ornamental plants. However, the difficulties of creating and maintaining the right conditions for the growth of this plant can cause issues. The leaves’ blackening is one of them.

This article you’ll be able to learn about the different reasons for this issue. We will also provide you with a suggestions for ways to prevent the problem and solutions for every cause.

Peace lily leaves becoming black or with black spots because of fungal infections as well as the existence of insects can cause this issue. Other reasons include overfertilization the wrong amount of light and humidity, low levels of humidity and the wrong selection of the mixing the potting mix.

Causes Why Peace Lily Leaves Turn Black

The plants belonging to the family of aroids can be extremely demanding in regards to humidity and water.

The natural habitat of peace the lily is a tropical forest You must recreate the conditions at your house. It can be quite difficult.

You can create the atmosphere that your peace lily will prefer by setting the ideal temperature, using an appropriate amount of water and using water of high-quality.

Here’s a list of causes that could be causing the black spots appearing on the leaflets of the Peace Lily :

Incorrect Watering

This is a reference to that both overwatering and underwatering are possible. Rainforest is an area in which rainy showers can be a regular occasion.

Therefore the Peace lily can’t take well to water. If you don’t keep your Peace Lily, you could anticipate the leaf to shrink and then die within a short time.

The roots will not be able to carry enough water to the other areas of the plant if the soil is dry.

It also affects the transport of micronutrients that are required by the plant’s water for to ensure proper development and growth.

The lack of hydration and micronutrients is why peace lily’s appearance is so drab. appearance.

However the overwatering could have worse consequences.

If you overburden peace lily plants with large quantities of water the soil will turn wet. The soil is anoxic and the roots are suffocated.

In simple terms The roots die and cease to perform their usual function. In the end, water and nutrients aren’t transported to the upper parts in the plants.

How to Fix This Problem?

Water Consistently

To ensure proper watering for this peace lily consistency is the most important factor. Do not let the soil get dry and crusty, nor create an unpleasant swamp within your pot. It is important to keep the soil damp but not completely damp.

If certain leaves are dying and fall off, remove them using sharp, sterilized cutters. This will stop the transfer of nutrients to non-productive leaves.

peace lily on stand

Set Up A Good Drainage System

To prevent waterlogging, ensure that drainage holes are in place and functioning. Make sure that your peace lily isn’t in a dish that is filled with water for too long.

The capacity to drain soil mixes is also an important aspect to take into consideration. So select a good drainage soil for your peace lily.

Mineral Deposits (Water Quality)

The tap water that is used in homes usually has significant levels of fluoride and chloride, bicarbonates, as well as other impurities.

Your Peace Lily won’t react positively to this kind of water. These compounds could cause the formation of acid or salinity in the soil.

The build-up of salt in the potting soil can result in inefficient supply of enough water for the plants. The soil’s salts tend to absorb water, making it unaccessible to the roots and the plant’s absorb.

Additionally the dissolved sodium and chlorine ions can displace other nutrients that are essential to the soil, leading to deficiency. (Source: University of Massachusetts Amherst, The Center for Agriculture, Food, and the Environment)

Since the plant isn’t receiving nutrients like magnesium, potassium, and phosphorus, it will change its leaf color. Certain leaves change color from yellow to purple, and brown with black spots.

How to Fix This Problem?

Filter the Water

If you were to water your peace lily with tap water you’ll probably see dark spots on the leaves in the near future.

One option is to filter water from the tap to lower the amount of fluoride and chloride. Also, think about using distillation water.

If there is no filter available You can allow the water to sit for 24 hours before you make use of it. Chemicals such as chlorine simply evaporate, making the water with less toxicity.

Collect Rainwater

If you have the opportunity to collect rainwater, it is the ideal water to your plants.

You can store water by storing it in a large container and store it for later use in your plants.

Fungal Leaf Spot ( Cercospora, Phyllosticta or Rhizoctonia)

The leaves are covered in black spots. can be caused by more than poor watering or poor quality. It is important to be aware that fungi thrive in humid environments.

The moist soil of potting and the foliage create the perfect environment for them.

If you see dark grey circles that have yellow centers the peace lily could be suffering from Cercospora fungi.

A fungus belonging to the genus Phyllostica causes necrotic leaf spots that have bordering of purple or red.

If the spots on your peace lily are bright yellow and have the alternating dark and light concentric rings, then it’s being threatened with Rhizoctonia invaders. (Source: Louisiana State University)

How to Fix This Problem?

Use Baking Soda

This method is less damaging to plants. Baking soda is an excellent antifungal agent , and is also non-toxic. Dissolve one teaspoon baking soda in 1 liter of water. Then put the mixture in the bottle of spray.

Apply the solution to affected areas from the peace lily. Repeat the application until you have completely removed any traces of fungus.

Use Pathogen-Specific Fungicide

It is necessary to apply a fungicide that is specifically designed for a pathogen which has attacked the leaves of peace lily.

Be aware of the recommended quantity and concentration of the fungicide solution that you choose to use.

Treatment for fungicides to treat Cercospora leaves spots should be applied only once to prevent fungal resistance.

Examine each leaf carefully and then cut off damaged ones to stop the disease from spreading to the affected areas.

Root Rot

Sometimes, the root of the issue is hidden under that soil’s surface. The wilting of the entire plant can indicate that there’s an unclean and moldy root beneath the surface.

Roots that are rotten usually change from white to black and brown. Poor drainage and waterlogging frequently cause root decay.

Cylindrocladium fungi are among the most commonly encountered pathogens of root rot. When the roots begin to rot and the leaves become mushy, they turn and the colors change from brown to yellow to black. (Source: The Pharma Innovation Journal, 2017)

How to Fix Peace Lily Root Rot

Repot the Peace Lily

If the root is rotten in a small amount it is still possible to save your Peace Lily. Take the entire plant out of the pot, and then remove any the soil that is left behind with a gentle shaking.

Cleanse the root with an a gentle stream of tap water or make use of the distillated water to do that.

Cut the pieces that are rotten using sterilized scissors. Cover the root with newspaper and keep it away from the soil for a few days so that it can dry and air-ventilate.

Let the roots heal to prevent further damage. The peace lily should be planted in new pots of soil.

Check out this post to learn more about the reasons for this and solutions to stop the root rot of peace lily.

Withhold Water for A While

The damaged roots require time to recover. It is best to keep water off the plant for a while until the plant is healed.

Once the plant has recovered its energy, you can slowly add water. Be sure to do the amount in a moderate manner.


In excess amounts of fertilizer, particularly nitrogen can increase the soil’s acidity. This causes an imbalance in chemical balance and impaired the absorption of minerals by the roots.

Fertilizers contain soluble salts that dissolve in the water that is found in the soil. Fertilizers contain soluble salts that dissolve in the water that is found in the soil.

When salts accumulate within the soil it is deficient, resulting in the condition of drought. Certain essential nutrients like manganese, iron, magnesium copper, iron, and potassium are not available for plant use.

Insufficient nutrients lead to necrosis of the leaf, with parts of the leaf turning black, tips burning, wilting and sometimes even the dying of plants. (Source: University of Massachusetts Amherst)

How to Fix Overfertilization

Wash The Salts Away

Leach the soil using distillate water to eliminate excessive salts as well as other substances from fertilizers that are too high.

Check your drainage system works adequate to remove affected water effectively. Consider using alkaline water to aid in neutralization of low pH values.

Cold Injury

In the tropical regions where peace lily is a part it is not possible to get lower than the temperature of 25oC (77oF).

Peace lily isn’t able to tolerate temperatures that are too low. It’s not recommended to place this plant in rooms that are cold.

Root ceases to function normally and leaves aren’t able to evaporate when temperatures are cold.

The metabolism of the entire plant is affected and the leaves begin to lose their strength. Soon after, once the plant has thawed there are dark spots on your leaves due to the cold damage.


In the event that any of these reasons mentioned above aren’t the reason why your peace lily leaves are turning black, it is best to determine whether you’re hosting unwanted guests like mealybugs, scales, or mites.

These insects usually live in the leaves of the peace lily to aid in food and reproduction.

They chew and suck the tissues, causing damage to the plant, resulting in black spots.

How to Fix This Problem?

Shower The Plant

Make sure to wash the plant, and let the water flow lightly. The force of water could harm the plant. Showers of water can cleanse numerous insects.

Spray Homemade Solutions

You can make your own solution by making use of insecticidal soap and neem oil, dishwashing liquid and other products for the home.

Mix it with water and spray it onto the plant. The majority of insects are killed by these solutions.

Use Species-Specific Insecticide

If the other alternatives don’t work, you can try applying an insecticide designed specifically for the specific species of insect.

Do not overdo it when applying insecticide as it can contain harmful chemical compounds. Always take your plant outdoors when you spray insecticides.

How to Save Peace Lily From Cold Injury

Place in A Warmer Location

Then, place the Peace Lily in a warm room. Do not cut off the dead leaves right away.

The leaves can prevent any further harm by protecting the plant from further injury by insulating it. If there’s an infection caused by a fungal or bacterial organism it is imperative to eliminate the leaves.

Because of the occurrence of cold injuries during winter, trim off damaged leaves in spring to create a callus at the point of injury.

But, the temperature of the area in which you keep peace lilies should not be lower than 15oC (59oF).


Peace lily is attracted to places that have an excessive amount of humidity. It can’t bear dry air for long periods of time.

If your Peace Lily in a space equipped with cooling, heat generators, as well as ovens the blackened leaves shouldn’t come as a shock.

Dry air causes the increase of the rate of transpiration. This causes plants to shed much more of the water it gets.

The result is the dehydration that affects the whole plant, leading to a shrinking appearance. If there is a flower , it will dry up and change to black or brown..

How to Fix Humidity

Group The Plants

Increase the amount of humidity by combining peace lily in a group with other tropical plants within the room. Because they are grouped like this they create a unique microclimate that has a higher percentage of humidity.

Mist The Leaves

Mist over the Peace Lily to create an air of moisture that covers leaves. It is possible to do this approximately twice a week, early at dawn.

Get A Humidifier

A humidifier can help in boosting humidity at home. If you own one, put it close to your tropical plants, including the peace lily. The additional moisture will aid the plant in its growth.

Low Light

The arum species is shade-loving plant , so it is best to avoid the direct sun. Insufficient light levels however could cause a dull hue of the leaves.

This implies that it is necessary for it to be exposed to a sufficient amount of sunlight. This will provide energy for the sugar accumulation.


Place under Bright, Indirect Light

Peace lily loves indirect sunlight the most. It is best to place it in a bright space with big windows facing east.

Try using LED bulbs to boost the brightness since they don’t produce heat. (Source: University of Vermont, Department of Plant and Soil Science)

How can I prevent Blackening of Peace lily leaves?

Prevention is always better than treatment. If you are reading this article right now and are a healthy, beautiful Peace Lily with shining green leaves, then you must know how to stay clear of the issues mentioned earlier.

Follow this guideline and discover a variety of ways to avoid the darkening of the leaves of the peace lily.

Watering Frequency

This is a crucial factor to ensure that your plant grows and develops normally. You should water your peace lily at least every week, and then dampen the soil all over. Increase the frequency of watering when it’s hot , and decrease when it’s cold.

Choose The Right Type Of Soil

Small grains of soil tend to compact and clump and cause water to blockage within the root system.

Do not choose clay soils in any way. Mixing peat with vermiculite is the most suitable option for your plant.

Ensure Good Drainage System

The water must be able to exit the pot. To prevent plants from sitting in excessive water, use Styrofoam to act as a drainage layer beneath the pot. You can also poke the soil using a pencil to loosen the soil.

Handmade Compost Usage

It is not a good idea to throw away the water that you cleaned the eggs and vegetables or the carrot and potato peels.

These residues can be used to supplement your Peace lily with micronutrients that are essential to your health.

Peace lily’s will love the compost from your garden because they don’t contain too many salts or harmful chemicals like the fertilizers commonly used.

Pay Attention to Pot Size

If you plant a Peace Lily in a tiny pot, make sure to water it more often using smaller amounts of water since the tiny amount of soil is drying faster.

On the other hand the other hand, a larger pot will yield more soil. If you choose a larger pot, you will need to water it less often with greater quantities of water.

Match Temperature And Sunlight

A room that is warmer and has plenty of indirect light is the ideal combination for the peace flowering lily.

It is recommended that you can demonstrate adequate temperatures without the use of heat generators since they can reduce humidity in air.

The ideal temperature for Peace Lilies is around 20 degrees Celsius (68oF). Large windows can provide sufficient sunshine.


Why Are My Peace Lily Leaves Turning Brown?

The most common causes include improper watering that results in the water is soaked and overwatered, poor lighting circumstances (exposure to direct sunlight or poor light) as well as too much fertilizer.

How Do I Know If My Peace Lily Is Dying?

The drooping leaves that are beginning to lose their healthy green color, and are turning brown and yellow are the most obvious indicators of peace dying lilies.

Why Are My Leaves Turning Yellow And Brown?

The combination of water overflow and underwatering could alter the color of the water to brown and yellow.

A deficiency of nutrients like manganese, iron zinc can trigger chlorosis in the leaves. Peace lily care in dark areas can hinder photosynthesis, resulting in the formation of etiolated (pale or yellow) leaves.



Went from a bad gardener to a half-decent one over 10+ years. Super happy to share my tips and tricks with you :)