If you notice Calathea leaves curling, your plant may be reacting to changes in moisture, humidity, temperature, light, or its growing conditions. Calatheas are tropical plants that naturally prefer warm, humid environments, so even small changes can cause their leaves to curl inward or become less open.
The good news is that curled leaves do not always mean something is seriously wrong. By looking at the leaves, soil, and growing environment, you can usually identify the cause and make simple adjustments.
What Does It Mean When Calathea Leaves Curl?
Calathea leaves may curl upward, inward, or along the edges. Sometimes the curling affects only a few leaves, while other times most of the plant begins to curl.
Leaf curling is often the plant’s response to environmental stress. It can reduce the leaf surface exposed to dry air or excessive light.
Before changing anything, check the soil moisture, room temperature, humidity, light exposure, and the condition of the leaves.
For more information about identification and general care, see our guide to the Calathea Plant.
Underwatering
One of the most common reasons for Calathea leaves curling is insufficient water.
Calatheas prefer consistently moist soil. If the soil becomes very dry, the leaves may curl inward, droop, or develop dry-looking edges.
How to check
Push your finger about an inch into the soil. If the soil feels dry several inches below the surface, the plant may need water.
Water thoroughly until some water drains from the bottom of the pot. Then allow excess water to drain completely.
Avoid giving the plant only a small amount of water each time. Light watering may leave the lower part of the root zone dry.
Low Humidity
Calatheas are tropical plants, so dry indoor air can quickly affect their leaves.
This is particularly common during winter when indoor heating reduces humidity. Air conditioning can also create a dry environment.
Low humidity may cause:
- Curling leaf edges
- Brown tips
- Dry-looking leaves
- Drooping foliage
- Slower new growth
A humidifier can help create a more stable environment. Grouping several tropical plants together may also slightly increase the humidity around their foliage.
Keep the plant away from strong heating vents and direct blasts of air conditioning.
Too Much Direct Sunlight
Calatheas generally prefer bright, indirect light rather than strong direct sunlight.
When exposed to intense afternoon sun, their leaves can become stressed. Curling may occur along with faded patches or dry areas.
Try moving the plant to a location with bright filtered light. A few feet away from a sunny window can work well, depending on the direction and intensity of the light.
A sheer curtain can also soften strong sunlight while still allowing plenty of light to reach the plant.
Temperature Stress
Sudden temperature changes can cause Calathea leaves to curl.
These plants generally prefer stable, warm indoor conditions. Cold drafts from windows or doors can be particularly stressful, while hot air from heaters can dry the foliage.
Avoid placing your Calathea directly beside:
- Air conditioners
- Heating vents
- Drafty windows
- Exterior doors
- Very cold glass during winter
A stable location is often better than repeatedly moving the plant from one environment to another.
Water Quality
Sometimes the problem is not simply how much water you provide but the quality of the water.
Calatheas can be sensitive to certain minerals and salts that may accumulate in the soil over time. Depending on your local water supply, tap water may contain substances that some Calatheas respond poorly to.
If your plant repeatedly develops brown edges or curling despite good watering and humidity, consider using filtered water or another suitable low-mineral water source.
If you use tap water, allowing it to sit before watering may be helpful in some situations, although this does not remove all minerals from the water.
Overwatering and Poor Drainage
Although underwatering can cause curling, constantly wet soil can also create problems.
Calathea roots need access to oxygen. If the pot stays saturated for long periods, the roots may become stressed, and the foliage can begin to droop or curl.
Check whether your pot has drainage holes. Also examine the soil. Heavy, compacted soil that remains wet for many days may need improvement.
Water when the upper portion of the soil begins to dry rather than following a rigid schedule.
The goal is moist soil, not permanently waterlogged soil.
Pests Can Also Cause Curling
Small pests can sometimes affect Calathea foliage.
Look closely at the undersides of leaves and around new growth. Spider mites, thrips, and other plant pests may cause distorted or stressed foliage.
Signs to watch for include:
- Tiny insects
- Fine webbing
- Speckled leaves
- Sticky residue
- Distorted new leaves
- Unusual discoloration
If you suspect pests, isolate the plant from other houseplants while you inspect it more carefully.
Should You Cut Off Curled Calathea Leaves?
You usually do not need to remove a leaf simply because it is curled.
If the leaf is still green and healthy, it can continue contributing energy to the plant. First, correct the environmental problem and give the plant time to respond.
A severely damaged or completely dried leaf can be removed with clean pruning scissors.
Keep in mind that an already damaged leaf may not return to its original appearance. The more useful sign of recovery is healthy new growth.
How to Prevent Calathea Leaves From Curling
Consistent care is one of the best ways to prevent recurring leaf curling.
Try to provide:
- Bright, indirect light
- Evenly moist but well-drained soil
- Moderate to high humidity
- Stable indoor temperatures
- Protection from drafts
- Good air circulation
- A suitable pot with drainage holes
Most importantly, observe the plant regularly. Calatheas often show environmental stress through their leaves before other obvious signs appear.
A Simple Troubleshooting Checklist
If your Calathea leaves are curling, check the growing conditions in this order:
1. Check the soil.
Is it extremely dry, or does it remain wet for a long time?
2. Check humidity.
Is the plant near heating or air conditioning?
3. Check light.
Is direct sunlight hitting the leaves?
4. Check temperature.
Has the plant recently experienced a cold draft or sudden temperature change?
5. Inspect the leaves.
Look underneath the foliage for signs of pests.
6. Check drainage.
Make sure excess water can escape from the pot.
Making one change at a time can help you determine which condition is affecting the plant.
Final Thoughts
Calathea leaves curling is usually a sign that the plant is responding to its environment. Underwatering, low humidity, excessive direct light, temperature changes, poor drainage, water quality, and pests are among the most common factors to investigate.
Rather than immediately cutting off curled leaves, start by checking the plant’s growing conditions. Once the underlying problem is corrected, new leaves should have a better chance of developing normally.
Calatheas can be sensitive plants, but they become much easier to manage once you understand what their leaves are telling you.
FAQ
Why are my Calathea leaves curling inward?
Curling can be caused by dry soil, low humidity, strong light, temperature stress, or other environmental changes. Check the plant’s growing conditions before making major changes.
Can underwatering make Calathea leaves curl?
Yes. When the soil becomes too dry, Calathea leaves may curl, droop, or develop dry edges. Water thoroughly when the soil needs moisture.
Do Calatheas need high humidity?
Calatheas generally grow best in humid conditions. Dry indoor air can contribute to curled or brown leaf edges.
Should I mist my Calathea?
Misting may temporarily increase moisture around the foliage, but it does not provide the same consistent humidity as a humidifier or naturally humid environment.
Will curled Calathea leaves uncurl?
Sometimes mildly curled leaves may improve after the growing conditions are corrected. However, severely damaged leaves may not return completely to their previous appearance.
How much light does a Calathea need?
Calatheas generally prefer bright, indirect light. Strong direct sunlight can stress or damage their leaves, especially during the brightest part of the day.