Geranium Leaves Turning Yellow? Causes & Solutions Revealed

Are your geranium leaves turning yellow? Don’t worry, it’s a common problem that can be easily resolved. Geraniums are popular plants known for their vibrant colors and lovely foliage, but yellowing leaves can be detrimental to their overall health and beauty.

In this article, we will explore the various causes of yellowing geranium leaves and provide effective solutions to prevent and treat this issue. Healthy leaves are crucial for plant growth and vitality, so let’s get started on restoring your geraniums to their full potential.

Common Causes of Yellowing Geranium Leaves

While geraniums are generally easy to care for, yellowing leaves can be a common problem, and it’s important to know the causes in order to effectively treat and prevent this issue. Here are some of the most common factors that can lead to yellow leaves on your geranium plants:

Causes Symptoms
Inadequate sunlight Yellowing leaves that may also appear small or stunted
Overwatering Leaves that turn yellow and may also appear waterlogged or droopy
Nutrient deficiencies Yellow spots or discoloration on leaves
Pests and diseases Yellow spots on leaves that may also have holes or other signs of damage
Environmental stressors Yellow leaves that may also be curled or have dry edges

Inadequate sunlight

Geraniums require plenty of bright, direct sunlight to thrive, so if they’re not getting enough light, their leaves may start to turn yellow. Make sure your geraniums are getting at least 6 hours of direct sunlight each day, and if necessary, consider moving them to a sunnier location or adding supplemental grow lights.


Overwatering is a common problem with geraniums, as they prefer slightly dry conditions. If the soil is constantly wet or waterlogged, the roots can’t get the oxygen they need, which can cause the leaves to turn yellow and the plant to wilt. Make sure to water your geraniums only when the top inch of soil feels dry, and be sure to provide adequate drainage by using a well-draining potting mix and a container with drainage holes.

Nutrient deficiencies

Geraniums require a balanced diet of nutrients to stay healthy and green, so if they’re not getting enough of certain minerals, their leaves may start to show discoloration or yellow spots. Make sure you’re using a fertilizer that’s specifically formulated for geraniums and follow the instructions carefully. If you notice yellowing leaves despite proper fertilization, you may need to adjust the levels of specific minerals, such as iron or nitrogen.

Pests and diseases

Geraniums are susceptible to a range of pests and diseases, which can damage the leaves and cause them to turn yellow. Common culprits include spider mites, aphids, and fungal infections. Regularly inspect your plants for any signs of damage or infestation, and take measures to control pests and diseases as soon as possible.

Environmental stressors

Geraniums can be sensitive to extreme temperatures, high humidity, and poor air circulation, which can lead to yellow leaves and other signs of stress. Make sure to provide your plants with optimal growing conditions, such as moderate temperatures (around 60-75 degrees Fahrenheit), good air circulation, and moderate humidity. Avoid placing your geraniums near heating or cooling vents, as well as cold drafts.

By addressing these common causes of yellowing leaves on geraniums, you can keep your plants healthy and thriving for years to come.

Overwatering and Yellow Leaves on Geraniums

One of the most common causes of yellow leaves on geranium plants is overwatering. When the soil is constantly saturated, it can lead to root rot and nutrient deficiencies.

To prevent overwatering, it is important to check the soil moisture regularly. Use a finger to check the top inch of soil; if it feels dry, it is time to water. Also, make sure the pot has proper drainage to allow excess water to escape.

If you suspect overwatering is the cause of yellowing leaves, it may be necessary to repot the plant in fresh, well-draining soil. Be sure to remove any rotted roots before replanting.

Nutrient Deficiencies and Yellowing Geranium Leaves

Nutrient deficiencies can cause yellowing, stunted growth, and poor flowering in geranium plants. These problems can be caused by a lack of essential macronutrients, such as nitrogen, phosphorus, and potassium, or micronutrients, such as iron, magnesium, and manganese.

Identifying the specific nutrient deficiency is key to resolving the issue. For example, a lack of nitrogen can cause yellowing of older leaves, while a phosphorus deficiency can lead to purplish or bronzed-colored leaves. A lack of iron can cause the leaves to turn yellow with green veins.

The best way to prevent these nutrient deficiencies is to use a well-balanced fertilizer and follow the recommended application rates. If you suspect a deficiency, you can also have your soil tested to determine which nutrients may be lacking.

Nutrient Symptoms of Deficiency
Nitrogen Yellowing of older leaves
Phosphorus Purplish or bronzed-colored leaves
Potassium Yellowing of leaf margins
Iron Yellowing of leaves with green veins

If you discover a nutrient deficiency in your geraniums, you can address it by applying a fertilizer that contains the missing nutrient. You can also apply a foliar spray directly to the leaves, which can be quickly absorbed and provide a faster response.

Remember that over-fertilization can also cause damage to geranium plants, so it’s important to follow the recommended application rates and not exceed them.

Preventing Nutrient Deficiencies

Preventing nutrient deficiencies can be achieved by ensuring your geranium plants have a well-drained soil that’s rich in organic matter. Regularly fertilizing your plants with a balanced fertilizer can also prevent the problem from happening in the first place.

Another effective way to prevent nutrient deficiencies is to mulch around the base of the plant. This will help to regulate soil temperature, conserve moisture, and provide a slow release of nutrients as the organic matter breaks down.

Pests and Diseases as Culprits for Yellow Leaves on Geraniums

Yellow spots on geranium leaves can also be caused by common pests and diseases. These problems can weaken the plant and make it more susceptible to other issues. Here are some of the most common pests and diseases that affect geraniums:

Pests Diseases
Aphids Botrytis blight
Spider mites Crown rot
Thrips Leaf spot

If you notice signs of pest or disease infestations, it’s important to take action quickly. Here are some tips for dealing with common geranium problems:

  1. Aphids: These small, soft-bodied insects can be removed by spraying them off with a strong stream of water or by using insecticidal soap.
  2. Spider mites: These tiny pests can be controlled with insecticidal soap or neem oil.
  3. Thrips: These slender insects can be controlled with insecticidal soap or neem oil.
  4. Botrytis blight: This fungal disease causes brown spots on leaves and flowers. Prune affected areas and apply a fungicide to prevent further spread.
  5. Crown rot: This fungal disease causes the plant to wilt and die. Remove affected plants and do not replant in the same location.
  6. Leaf spot: This bacterial disease causes brown spots on leaves. Remove affected leaves and avoid overhead watering to prevent further spread.

Preventing pests and diseases is key to maintaining healthy geraniums. Regular inspection and proper maintenance practices like pruning and cleaning up debris can help prevent infestations and disease outbreaks.

Environmental Stressors and Yellowing Geranium Leaves

Geraniums are sensitive plants that can be affected by various environmental stressors. Extreme temperatures, high humidity, and poor air circulation are some of the most common causes of yellowing and wilting leaves. These stressors can also attract pests and diseases, further compromising the health and beauty of your plants.

Tips for Creating Ideal Growing Conditions

To prevent yellowing foliage in geraniums, it’s essential to provide optimal growing conditions. Here are a few tips to help you:

Tips Description
Avoid Overcrowding Geraniums require ample space to grow and thrive. Avoid planting too many geraniums in a small area, as this can limit air circulation and create a humid environment that encourages pests and diseases.
Provide Adequate Sunlight Geraniums need at least six hours of sunlight each day to maintain healthy foliage. If your plants are not receiving enough light, supplement with artificial lighting or move them to a sunnier spot.
Control Temperature and Humidity Keep your geraniums in an area with consistent temperatures between 65°F to 75°F and humidity levels between 40% to 60%. Avoid exposing them to sudden temperature changes or extreme fluctuations.
Use a Well-draining Soil Geraniums prefer well-draining soil that allows excess water to drain away quickly. Avoid waterlogged soil, as this can suffocate the roots and lead to yellowing leaves.

By following these tips, you can create a healthy environment for your geraniums and prevent yellowing foliage. Regular inspection for pests and diseases, proper watering, and balanced fertilization are also essential for maintaining vibrant and lush geraniums.

Effective Solutions for Yellow Leaves on Geraniums

Preventing and treating yellow leaves on geranium plants is crucial for maintaining their overall health and beauty. Here are some effective solutions:

Practice Description
Proper Watering Water geraniums thoroughly and allow the soil to dry out between watering to avoid overwatering. Make sure the pot has drainage holes for excess water.
Balanced Fertilization Use a balanced fertilizer to ensure your geraniums have adequate nutrients. Avoid over-fertilizing, which can lead to nutrient burn and yellowing leaves.
Pest Control Check your geraniums regularly for pests and use appropriate treatment methods if necessary. Neem oil or insecticidal soap are effective and natural options.
Environmental Factors Provide an optimal growing environment by keeping your geraniums in a sunny location with good air circulation. Protect them from extreme temperatures and fluctuating humidity.

By following these solutions, you can prevent and treat yellow leaves on your geraniums to keep them looking healthy and vibrant.

Additional Tips for Healthy Geranium Leaves

If you want to keep your geranium leaves green and healthy, there are a few extra steps you can take to ensure optimal growth. Here are some additional tips:

  • Prune regularly: Pruning your geranium plants regularly promotes healthy growth and removes any yellowed or damaged leaves.
  • Remove yellowed leaves: As soon as you notice any yellowed leaves, remove them promptly. This helps prevent the spread of disease and keeps the plant looking healthy.
  • Provide adequate sunlight: Geraniums require plenty of sunlight to thrive. Make sure they get at least six hours of direct sunlight each day.
  • Use well-draining soil: Poorly-draining soil can lead to waterlogged roots and yellowing foliage. Use a well-draining soil mix to help prevent this issue.
  • Inspect regularly for pests and diseases: Keep an eye out for common pests and diseases that affect geraniums, such as spider mites and powdery mildew. Regular inspection can help catch issues early and prevent them from spreading.

By following these additional tips, you can help keep your geranium leaves healthy and vibrant, and ensure your plants thrive for years to come.


Yellowing leaves on geranium plants can be a sign of various issues, including overwatering, nutrient deficiencies, pests, diseases, or environmental stressors. It is important to address these problems as soon as possible in order to maintain overall plant health and aesthetics.

By following the solutions and tips outlined in this article, such as proper watering techniques, balanced fertilization, pest control, and creating optimal growing conditions, you can prevent and treat yellowing leaves on your geranium plants.

Takeaway Tips:

  • Regularly inspect your geranium plants for yellowing leaves and address the issue promptly
  • Ensure your plants receive adequate sunlight and air circulation
  • Use well-draining soil to prevent overwatering
  • Balance fertilization to avoid nutrient deficiencies
  • Prune and remove yellowed leaves to promote healthy growth
  • Implement pest control measures to prevent infestations

By following these tips and practicing good plant maintenance, you can keep your geraniums looking green and vibrant all year round!


Q: Why are geranium leaves turning yellow?

A: There can be several reasons for geranium leaves turning yellow, including inadequate sunlight, overwatering, nutrient deficiencies, pests, diseases, and environmental stressors.

Q: How can I prevent yellow leaves on geraniums?

A: To prevent yellow leaves on geraniums, it is important to provide adequate sunlight, practice proper watering techniques, fertilize the plants with balanced nutrients, control pests and diseases, and create optimal growing conditions.

Q: What are the common causes of yellowing geranium leaves?

A: The common causes of yellowing geranium leaves include inadequate sunlight, overwatering, nutrient deficiencies, pests, diseases, and environmental stressors.

Q: How does overwatering contribute to yellowing leaves on geraniums?

A: Overwatering can lead to yellowing leaves on geraniums because it causes root rot and hampers the plant’s ability to take up nutrients properly. It is important to water geraniums only when the top inch of soil feels dry.

Q: What role do nutrient deficiencies play in yellowing geranium leaves?

A: Nutrient deficiencies can cause yellow spots and discoloration on geranium leaves. It is important to provide balanced fertilization and address specific nutrient deficiencies to maintain healthy foliage.

Q: How can pests and diseases affect geranium leaves?

A: Pests and diseases can lead to yellowing and spots on geranium leaves. It is important to identify common pests and diseases affecting geraniums and implement appropriate treatment and prevention methods.

Q: How do environmental stressors contribute to yellowing geranium leaves?

A: Environmental stressors such as extreme temperatures, humidity, and poor air circulation can impact the health of geranium leaves, leading to yellowing. Creating optimal growing conditions can help prevent this issue.

Q: What are some effective solutions for yellow leaves on geraniums?

A: Some effective solutions for yellow leaves on geraniums include regular maintenance, proper watering, balanced fertilization, pest control, and addressing environmental factors.

Q: What additional tips can help maintain healthy geranium leaves?

A: Additional tips for maintaining healthy geranium leaves include pruning, removing yellowed leaves, providing adequate sunlight, using well-draining soil, and regularly inspecting for pests and diseases.