Why Peace Lily Leaves Turn Black


Welcome to my comprehensive guide on why Peace Lily Leaves Turn Black, a concerning issue that can leave plant owners puzzled.

If you’ve noticed your peace lily’s lush green leaves turning an alarming black color, you’re not alone in your worry.

In this article, I will explore the potential causes behind this phenomenon, including factors such as overwatering, fungal infections, cold drafts, and inadequate lighting.


Why does Peace Lily leave Turn Black?

The Peace Lily is a popular houseplant known for its attractive white flowers and glossy green leaves.

However, sometimes the leaves may turn black, which can be concerning for gardeners. The reasons for black leaves on Peace Lilies can include:

Reasons for the Peace Lily’s black leaves


One of the main causes of blackened Peace Lily leaves is overwatering. Overwatering causes root rot in Peace Lilies because it keeps the soil too wet for too long.

The plant may no longer be able to adequately absorb water and nutrients as a result of the roots becoming injured.

The effect could be that the leaves start to wither and turn black. Let the soil dry out a little between waterings and avoid watering the plant too frequently to avoid overwatering.

Utilizing a soil mixture with good drainage and a pot with adequate drainage holes is also beneficial. You can maintain your Peace Lily healthy and avoid having black leaves by not overwatering them.


A peace lily’s leaves may turn crispy and black from underwatering. The plant’s leaves dry out and die when the soil is too dry because it cannot collect enough moisture to maintain its growth.

Make sure the soil is regularly moist but not soggy to prevent underwatering. Water the plant only when the top inch of soil feels dry to the touch.

Lack of Light

Lack of light can cause the leaves of a peace lily to turn black and stunt the plant’s growth. Peace lilies prefer bright, indirect light, but can tolerate low light conditions.

If a peace lily is not receiving enough light, it may not be able to produce enough chlorophyll to support its growth, causing the leaves to turn black.

Avoid direct sunlight, which can scorch the foliage, and situate the plant in a spot with bright, indirect light to prevent this.

If you’re unable to provide the plant with enough natural light, you might want to think about utilising artificial light to augment its requirements.

Low Humidity

A peace lily’s blooms may get brittle and black due to low humidity. The leaves of peace lilies can dry out and perish in dry air, and they prefer high humidity levels.

To increase humidity, you can place a humidifier nearby, mist the plant regularly, or place a tray of water near the plant to provide extra moisture in the air.

You can also group plants together to increase the humidity or place a pebble tray under the plant to help retain moisture.

If the air in your home is naturally dry, consider using a humidifier to maintain the proper humidity levels for your peace lily.

Fungal Disease

Fungi diseases like leaf spots or root rot can cause the leaves of a lily to turn black. Root rot happens when there is too much water in the soil, which makes it easy for fungi to grow.

A number of fungi can cause leaf spot, which is characterized by black patches on the leaves.

To prevent fungal diseases, be sure to water the peace lily properly and avoid overwatering, as well as ensure proper air circulation around the plant to reduce humidity.

If you suspect your peace lily has a fungal disease, you may need to remove affected leaves and treat the plant with a fungicide.


An infestation of pests, such as mealybugs or spider mites, can result in the blackening and eventual loss of a peace lily’s leaves.

Small pests that resemble spiders called spider mites feed on the plant’s sap, leaving yellow or brown spots on the leaves that eventually turn black and fall off.

Mealybugs are small, white, cottony pests that feed on the sap of the plant, causing yellowing and eventual death of the leaves.
To control pests, you can regularly inspect your peace lily for signs of infestation and treat it with insecticidal soap or neem oil.

How To Treat Black Leaves on Peace Lily?

Treating black leaves on a peace lily involves identifying the underlying cause and taking appropriate actions. Here are some steps to help address the issue:

Assess watering habits:

Black leaves can be a sign of overwatering or underwatering. Ensure that you’re providing proper watering by allowing the soil to partially dry between waterings. Adjust your watering frequency accordingly.

Check drainage:

Ensure that the pot has adequate drainage holes to prevent waterlogging. Well-draining soil is also essential. Report the peace lily if necessary.

Evaluate lighting conditions:

Peace lilies prefer bright, indirect light. Excessive exposure to direct sunlight can cause blackening of the leaves. Adjust the plant’s location to provide the right amount of light.

Maintain proper humidity:

Peace lilies thrive in high humidity. Mist the leaves regularly or place a tray of water nearby to increase humidity levels.

Trim affected leaves:

If the blackened leaves are extensive and unlikely to recover, trim them off to promote new growth. Use clean, sharp shears or scissors to avoid further damage.

Monitor for pests and diseases:

Check for signs of pests like aphids, spider mites, or fungal diseases. Treat any infestations or diseases promptly with appropriate insecticides or fungicides.

Provide proper care:

Ensure the peace lily is in a stable environment with temperatures between 60°F and 75°F (15°C to 24°C). Regularly dust the leaves to improve their ability to photosynthesize.


In conclusion, the black leaves on a peace lily can be caused by several factors, including overwatering, underwatering, lack of light, low humidity, fungal diseases, and pest infestations.

Your peace lily may stay healthy and avoid developing black leaves with the help of correct watering, enough light, the right humidity levels, sufficient air circulation, and routine insect management.

It’s recommended to speak with a local nursery or horticulturist for an appropriate diagnosis and course of action if you’re unclear of the cause of your peace lily’s dark leaves.

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FAQs – Peace Lily Leaves Turn Black

Why are the leaves of my peace lily turning black?

Blackened leaves in peace lilies can be caused by overwatering, root rot, or exposure to extreme temperatures. Check the soil moisture, improve drainage, and maintain appropriate temperature conditions.

Can direct sunlight cause peace lily leaves to turn black?

Yes, direct sunlight can scorch the leaves of peace lilies, resulting in blackened areas. Place your peace lily in bright, indirect light and avoid exposing it to direct sunlight.

Are black leaves a sign of a disease in peace lilies?

Black leaves can be a sign of fungal or bacterial infections, such as leaf blight or botrytis. Remove affected leaves and improve air circulation to prevent the spread of the infection.

Does cold temperature cause peace lily leaves to turn black?

Yes, exposure to cold drafts or temperatures below the plant’s tolerance range can cause the blackening of peace lily leaves. Keep the plant away from cold drafts and provide suitable temperature conditions.

How can I prevent the blackening of peace lily leaves due to overwatering?

To prevent overwatering, allow the soil to dry slightly between waterings. Ensure proper drainage and avoid letting the plant sit in standing water, as it can lead to root rot and blackened leaves.

Can underwatering cause peace lily leaves to turn black?

Peace flower blooms can dry up and turn black from underwatering. Make sure to water the plant sufficiently, letting the top inch of the soil dry up before providing additional water.

Are blackened leaves on my peace lily reversible?

Unfortunately, blackened leaves on peace lilies cannot be reversed. Remove the affected leaves to maintain the overall health of the plant and prevent further spread of any diseases.

Can using tap water cause peace lily leaves to turn black?

Yes, when exposed to tap water that contains excessive amounts of chlorine or other pollutants, the greenery of peace lily blossoms can turn black. Instead of immediately hydrating your plant with tap water, use filtered or distilled water.

Are there any pests that can cause peace lily leaves to turn black?

Certain pests, like spider mites or aphids, can infest peace lilies and cause damage that leads to blackened leaves. Inspect your plant for signs of pests and treat them with appropriate methods.

Can fertilization cause peace lily leaves to turn black?

Overfertilization or using a fertilizer with too high a nitrogen content can lead to blackened leaves in peace lilies. Follow the recommended fertilization schedule and use a balanced fertilizer for the best results.

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