Why Are My Calathea Leaves Turning Yellow? (14 Solutions)

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The Calathea plant, also known as the prayer plant, is a tropical plant known for its vibrant leaves.

However, if your Calathea leaves turn yellow, there might be something wrong.

This is a common problem with Calatheas, and there are several possible causes.

Here we will explore some of the possible causes of Calathea leaves turning yellow and how to solve the problem.

Why Are My Calathea Leaves Turning Yellow?

The Calathea plant is a popular indoor plant known for its beautiful leaves.

Calathea leaves can be green, purple, or pink, and they are often variegated with different colors on the same leaf.

Calathea plants are easy to care for, but sometimes their leaves will turn yellow.

There are several possible causes of this, and the solutions vary depending on the cause.

If your Calathea leaves are turning yellow, the first thing you should do is identify the cause.

The following are some of the most common causes of Calathea leaves turning yellow:

1. Low Humidity

While there are several potential causes of this problem, low humidity is one of the most common.

Calathea plants originate from tropical rainforests, where humidity levels are high.

Calathea leaves may begin to turn yellow in lower humidity environments and develop brown tips.

This problem is often compounded by dry air from heating and cooling systems, which can cause the leaves to become even more dehydrated.

How To Fix It:

Calathea plants need high humidity to stay healthy, so you need to increase the humidity level if your plant is in a low humidity environment.

If the humidity level in your home is below 50%, you can increase it by placing the plant on a tray of wet pebbles.

You can also use a humidifier to increase the humidity level in the room or mist the plant’s leaves with water a few times a day.

Keep in mind that overwatering can also cause the leaves to turn yellow, so be sure not to water the

2. Overwatering

Overwatering is another common cause of Calathea leaves turning yellow.

If the plant is constantly wet, the roots will become waterlogged, and the leaves will turn yellow.

When Calathea plants are overwatered, the roots cannot get the oxygen they need from the soil.

This lack of oxygen causes the leaves to turn yellow and eventually brown and die.

How To Fix It:

If you are overwatering your Calathea plant, the first thing you need to do is stop watering it.

Wait until the top inch of soil is dry before watering again.

Calatheas need to be watered sparingly, so be sure not to water the plant more than once a week.

You can also improve your pot’s drainage by adding some pebbles to the bottom or by planting the Calathea in a pot with a drainage hole.

3. Underwatering

One of the most common reasons Calathea leaves turn yellow is underwatering.

Calathea plants are native to tropical regions and require high humidity and consistent moisture to thrive.

When the soil is dry and the roots are not getting enough water, the plant won’t be able to take up the nutrients it needs, and the leaves will start to turn yellow.

How To Fix It:

If you are underwatering your Calathea plant, the first thing you need to do is water it more often.

Water the plant when the top inch of soil is dry, and give it plenty of water.

When watering, use room-temperature water and allow the potting mix to moisten evenly.

Allow any excess water to drain away before putting the Calathea back in its spot.

4. Water Quality

If your Calathea leaves are turning yellow, it may be due to the quality of the water you are using.

The chemicals in tap water can cause the leaves to turn yellow and even brown.

If you notice your Calathea’s leaves are turning yellow, it’s essential to check the quality of your water.

Calatheas are very sensitive to fluoride, chlorine, and other tap water chemicals.

These chemicals can damage the leaves and cause them to turn yellow.

Also, if the water is too hard, it can cause a build-up of minerals on the leaves and cause them to turn yellow.

How To Fix It:

If the water you are using is causing your Calathea leaves to turn yellow, you need to use filtered or distilled water instead.

You can also use rainwater or bottled water to water your Calathea plant.

Another option is to let the water sit out overnight, so the chlorine and other chemicals have a chance to evaporate, and then use the water to water your Calathea.

5. Fertilizer

If your Calathea leaves turn yellow, it may be due to too much fertilizer.

When Calatheas are fertilized too frequently or with too strong of a solution, the excess nutrients can build up in the soil and cause the leaves to turn yellow.

In addition, overfertilization can also lead to leaf scorch, a condition in which the tips and margins of the leaves turn brown and dry.

How To Fix It:

If you think your Calathea leaves are turning yellow due to too much fertilizer, the first thing you need to do is stop fertilizing it.

Flush the soil with water to remove any excess fertilizer and wait a few weeks before resuming fertilization.

Be sure to use a weaker solution when you start fertilizing again and only fertilize once a month during the growing season.

6. Poor Lighting

If your Calathea leaves turn yellow, it may be due to too little light.

Calatheas need bright indirect light to stay healthy and produce lush green leaves.

If the plant is not getting enough light, the leaves will start to turn yellow and eventually die.

This is because the plant is not able to produce enough chlorophyll.

Chlorophyll is essential for photosynthesis, and without it, the plant will not be able to generate the food it needs to survive.

How To Fix It:

If your Calathea is not getting enough light, the first thing you need to do is move it to a brighter spot.

If possible, place the plant near a window where it will get indirect sunlight.

The best place for a Calathea is in a north- or east-facing window.

Calatheas need at least six hours of bright light a day, so if you can’t move the plant to a sunnier spot, you may need to consider adding some artificial light.

7. Too Much Direct Sunlight

If your Calathea leaves turn yellow, it may be due to too much sunlight.

Calathea plants are native to tropical rainforests, where they grow in dappled sunlight under the canopy of tall trees.

In their natural habitat, Calathea plants never receive direct sunlight.

When grown as indoor plants, Calatheas need bright indirect light to thrive.

If they are placed in a spot that receives too much direct sunlight, they can sunburn, and the leaves will start to turn yellow.

How To Fix It:

If your Calathea is in a spot that receives too much direct sunlight, the first thing you need to do is move it to a place where it will get more indirect light.

If possible, place the plant near a window where it will get dappled sunlight.

The best place for a Calathea is in a north- or east-facing window.

A Calathea plant needs at least six hours of bright indirect light each day.

If you can’t move the plant to a spot with more indirect light, you can try using a sheer curtain or blinds to diffuse the sunlight.

8. Cold Temperatures

If your Calathea leaves are turning yellow, it may be due to cold temperatures.

Calathea plants are native to tropical climates and do not do well in cold temperatures.

The leaves may turn yellow due to the plant being stressed from the cold.

Another reason is that Calathea leaves are sensitive to changes in temperature and light.

If the plant is suddenly exposed to colder temperatures, the leaves may turn yellow as a result.

How To Fix It:

If your Calathea is in a room that is too cold, the first thing you need to do is move it to a warmer spot.

If possible, place the plant near a window where it will get more direct sunlight.

You can also use a grow light to give the plant some extra light.

If you cannot move the plant, you can use a space heater to warm up the room.

9. Heat Stress

Another possibility is that your Calathea is experiencing heat stress.

While Calatheas are native to tropical regions and thrive in warm climates, they can be sensitive to sudden changes in temperature.

When Calatheas are exposed to excessive heat, their leaves may begin to turn yellow and brown.

In some cases, the Calathea leaves may also curl or turn crispy.

If Calatheas are not given enough water, they may also experience heat stress.

In addition to turning yellow, the leaves may become dried out and brittle.

How To Fix It:

If you believe your Calathea is experiencing heat stress, the best thing to do is move it to a cooler spot.

Calathea plants thrive in temperatures between 65 and 80 degrees Fahrenheit.

If the plant is in a too warm room, move it to a cooler room or an area with more shade.

You can also increase the humidity in the room by using a humidifier and misting the plant regularly.

10. Pest Infestation

Another reason Calathea’s leaves may be turning yellow is because the plant is infested with pests.

Pests affecting Calathea plants include mealybugs, spider mites, and aphids.

There are several reasons why pests may cause Calathea leaves to turn yellow.

One possibility is that the pests are feeding on the leaves, which can damage the plant and cause the leaves to turn yellow.

Another possibility is that the pests are carrying a disease infecting the Calathea plant, which can also cause the leaves to turn yellow.

Finally, it is also possible that the pests are simply stressing the Calathea plant, which can cause the leaves to turn yellow as well.

How To Fix It:

If you believe your Calathea is infested with pests, the first thing you need to do is take a closer look at the plant.

Check the undersides of the leaves for any evidence of pests.

If you find evidence of pests, you need to take action to get rid of them.

There are several ways to get rid of pests, including using insecticidal soap, horticultural oil, or neem oil.

You can also spray the plant with a strong stream of water to dislodge any pests or remove them by hand using a damp cloth with soap.

11. Nutrient Deficiency

Another possibility is that your Calathea is experiencing a nutrient deficiency.

Calathea plants require high levels of nitrogen, potassium, and phosphorus to stay healthy.

If these nutrients are lacking in the soil, Calathea leaves will begin to turn yellow.

In some cases, leaves may also develop brown spots or edges.

How To Fix It:

If you believe your Calathea is experiencing a nutrient deficiency, the best thing to do is fertilize the plant.

You can use a high-quality fertilizer that contains a balance of all the essential nutrients that Calatheas need.

You can also add compost to the soil to help improve the nutrient levels.

In addition, changing the potting soil every year or so can also help to improve the nutrient levels.

12. Poor Soil Drainage

Another possibility is that your Calathea plant is in a pot with poor soil drainage.

Calathea plants do best in pots with a soil mix that drains well.

If the potting soil does not drain well, water will become trapped in the soil and can cause root rot.

How To Fix It:

If you believe your Calathea is in a pot with poor soil drainage, the best thing to do is repot the plant into a pot with better drainage.

Use a potting mix that is light and drains well.

You can improve the soil’s drainage by mixing in some sand or perlite.

You can also improve the pot’s drainage by putting a layer of gravel or broken pots at the bottom of the pot.

13. Adjusting to a New Environment

Another possibility is that your Calathea is adjusting to its new environment.

The main reason for this is that Calathea plants are susceptible to changes in their surroundings.

When they are moved to a new location, or even when the temperature or humidity in their current location changes, Calathea leaves can turn yellow as the plant tries to adjust.

How To Fix It:

If you believe your Calathea is adjusting to its new environment, the best thing to do is give it some time.

The plant will eventually adjust to the new environment, and the leaves will return to their normal color.

In the meantime, try to keep the temperature and humidity in the room where the plant is located as consistent as possible.

14. Natural Leaf Drop

Another possibility is that your Calathea is simply dropping its leaves as part of its natural growth cycle.

Calathea plants typically drop their leaves once they have reached maturity.

As Calathea leaves mature, they slowly begin to lose their green pigment.

This process is accelerated by exposure to direct sunlight, which bleaches out the chlorophyll in the leaves.

Eventually, the leaves turn yellow and then brown as they die off. While this is a natural process, it can be unsightly in a houseplant.

How To Fix It:

If you believe your Calathea is dropping its leaves as part of its natural growth cycle, the best thing to do is wait.

The leaves will eventually fall off and be replaced by new, healthy leaves.

In the meantime, try to keep the plant in a location where it receives indirect sunlight, so the leaves don’t bleach out.

Should I Cut Yellow Leaves off Calathea?

When a Calathea leaf starts to turn yellow, it can be alarming. It’s natural to wonder if you should cut the yellow leaf off.

The answer is: it depends.

If the leaves are only starting to turn yellow, then it’s likely that the plant needs a little bit of extra care. Try to determine the cause of the yellowing and address that.

If the leaves are mostly yellow and starting to dry out, it’s time to cut them off.

This will help keep the plant healthy and encourage new growth by removing the leaves that no longer support the plant.

Final Thoughts

Calathea is a popular indoor plant that is known for its beautiful leaves.

If your Calathea leaves are turning yellow, there may be a few reasons why.

However, it is due mainly to overwatering or lack of light.

Be sure to water your Calathea sparingly and give it plenty of bright indirect sunlight.

With proper care, your Calathea leaves should stay green and healthy.