5 Reasons Begonia Leaves Turning Yellow? How to Fix it?

Begonias are popular among plant enthusiasts due to their vibrant flowers and lush foliage. However, they can be a bit fussy, especially regarding their care. You’re not alone if you’ve noticed your begonia leaves turning yellow. This is a common issue among begonias, but the good news is that it can be fixed. Let’s explore why this happens and how you can rectify the situation.

Begonia Leaves Turning Yellow
Begonia Leaves Turning Yellow

Ideal Conditions for Begonia Growth

Begonias thrive in specific environmental conditions. They prefer a temperature range of 65°F to 75°F (18°C to 24°C) and high humidity levels. Most begonias require filtered or indirect sunlight, as direct sunlight can scorch their leaves. They also prefer well-draining soil that retains moisture but doesn’t become waterlogged.

Reasons Why Begonia Leaves Turn Yellow

Yellowing leaves are to the yellowing of begonia leaves. Understanding these reasons will help you diagnose and address the issue effectively.


Overwatering is a leading cause of yellowing leaves in begonias. When the soil remains constantly wet, it can lead to root rot and poor oxygen circulation, causing the leaves to turn yellow and wilt. Overwatering is particularly common in potted begonias or when drainage needs to be improved.

Over Watered


On the other hand, underwatering can also result in yellow leaves. Begonias require regular watering; if they don’t receive enough moisture, their leaves can become dehydrated and turn yellow. It’s essential to strike a balance and provide adequate water without overdoing it.

Lack of Light

Insufficient light exposure is another factor that can lead to yellowing begonia leaves. Begonias need bright, indirect light to thrive. If placed in low-light conditions, the leaves may lose their vibrant green color and turn yellow. Consider moving your begonia to a spot with better lighting or providing supplemental grow lights.

Nutrient Deficiency

Yellowing leaves can be a sign of nutrient deficiencies in begonias. Lack of essential nutrients like nitrogen, iron, or magnesium can cause the leaves to lose their green color. It’s essential to provide a balanced fertilizer formulated for begonias to ensure they receive the nutrients necessary for healthy growth.

Nutrient deficiencies

Disease and Pest Infestation

Begonias are susceptible to various diseases and pests, which can cause yellowing leaves. Fungal diseases like powdery mildew or bacterial infections can lead to leaf discoloration. Additionally, pests like aphids, spider mites, or mealybugs can infest the plants and cause damage. Regular inspection and appropriate treatment are essential to prevent and address these issues.

How to Fix Yellow Begonia Leaves

Addressing the underlying causes of yellowing leaves is crucial to restoring the health of your begonia plants. Here are some steps you can take to fix the issue:

Adjusting Watering Practices

Evaluate your watering routine and adjust it accordingly. Ensure the soil is well-draining, and water your begonias when the top inch of soil feels dry. Avoid overwatering and underwatering, finding a balance that suits the specific needs of your begonias.

Modifying Light Exposure

Provide adequate light to your begonias by placing them in a location with bright, indirect sunlight. If natural light is limited, consider using artificial grow lights to supplement the lighting conditions. Avoid exposing them to direct sunlight, as it can scorch the leaves.

Addressing Nutrient Deficiencies

Feed your begonias with a balanced fertilizer formulated for their specific needs. Follow the instructions on the fertilizer packaging and apply it regularly as recommended. This will help provide the necessary nutrients and correct any deficiencies that may be causing yellowing leaves.

Treating Diseases and Pest Infestations

If you notice signs of disease or pest infestation, take immediate action to prevent further damage. Treat fungal infections with appropriate fungicides, following the instructions carefully. You can use insecticidal soaps or natural remedies like neem oil for pest control. Regularly inspect your begonias and proactively keep them free from pests and diseases.

Prevention: Keeping Your Begonia Healthy

Preventing yellowing leaves in begonias is always better than fixing the issue. Here are some tips to keep your begonias healthy:

  • Provide proper drainage for potted begonias to prevent waterlogging.
  • Maintaining a consistent watering schedule allows the soil to dry out slightly between waterings.
  • Ensure your begonias receive sufficient indirect light or artificial grow lights.
  • Use a well-balanced fertilizer formulated for begonias to provide them with essential nutrients.
  • Regularly inspect your plants for any signs of disease or pest infestation and take prompt action if necessary.
  • Keep your begonias in a well-ventilated area with good air circulation to prevent humidity buildup and reduce the risk of fungal infections.
  • Avoid overcrowding your begonias, as this can lead to increased moisture retention and the spread of diseases.
  • Clean and sterilize your gardening tools to prevent the transmission of diseases from one plant to another.

By following these preventive measures, you can maintain the overall health of your begonia plants and minimize the occurrence of yellowing leaves.


Can I save a begonia with completely yellow leaves? 

 In most cases, if the leaves have turned completely yellow, reviving them may not be easy. However, following the recommended care practices, you can still focus on improving the plant’s overall health and preventing further yellowing.

Can I use any fertilizer for my begonias? 

Using a fertilizer formulated explicitly for begonias is best, as they have specific nutrient requirements. Look for a balanced fertilizer with a formulation suitable for flowering houseplants or begonias.

How often should I inspect my begonias for pests or diseases? 

Regularly inspect your begonias at least once a week. Look for signs of pest infestation, such as webs, small insects, or leaf damage. Check for any discoloration, spots, or wilting that could indicate a disease.

Can I propagate begonias to save a dying plant? 

Yes, begonias can often be propagated through stem or leaf cuttings. If you have a dying plant, you can try propagating healthy parts of it to start new plants.

Should I remove yellow leaves from my begonias?

Yes, it’s advisable to remove yellow leaves from your begonias. These leaves are likely damaged or dying and can attract pests or diseases. Pruning them off will improve the overall appearance and health of the plant.


Yellowing leaves in begonias can be a cause for concern, but the issue can be addressed with proper understanding and care. By identifying the underlying causes, such as overwatering, underwatering, lack of light, nutrient deficiencies, and diseases/pests, you can take appropriate steps to fix the problem.