Why My Boxwood Turning Yellow

Why My Boxwood Turning Yellow – Causes And Fix It

Pest and disease infestation are common problems that can affect boxwood plants. One of the symptoms of infestation is yellowing leaves.

To maintain plant health, it is important to take preventive measures such as proper watering and fertilization. Organic or chemical treatments can be used to eliminate pests or control diseases. Regular monitoring and inspection are necessary for early detection of any issues. By understanding these factors and taking the appropriate steps, you can ensure the health of your boxwood plants.

Here we will find why my boxwood turning yellow and take you through the step-by-step process of fixing the boxwood turning yellow issue. With our expert advice and guidance, you can say goodbye to yellowing leaves and welcome a thriving garden filled with lush green boxwood plants.

Why My Boxwood Turning Yellow

Why My Boxwood Turning Yellow – Common Causes

Why My Boxwood Turning Yellow - Common Causes

Boxwoods may turn yellow due to various reasons. Lack of sunlight is a common cause, as they require 4-6 hours of direct sunlight daily. Improper watering, either over or under, can also lead to yellowing leaves. Nutrient deficiencies, soil pH imbalance, and pest infestations are other culprits.

Environmental stress, such as extreme temperatures or drought, can also cause boxwood leaves to turn yellow. Proper care and promptly addressing these issues can help maintain your boxwood plants’ health and vibrancy. Here we are going to discuss why my boxwood turning yellow.

1. Overwatering


Excessive moisture can lead to yellowing boxwood leaves, making overwatering a common problem. To remedy the issue, reduce watering frequency and ensure the soil has proper drainage. Allow the top few inches of soil to dry out before watering again. Avoid planting boxwoods in areas with poor drainage or heavy clay soil to prevent root rot and yellow foliage. Proper moisture control is crucial for maintaining healthy boxwood plants.

2. Underwatering


Underwatering is a common cause of boxwood lost green. Regular watering is crucial for boxwoods, especially during hot and dry periods. When boxwoods don’t receive enough water, their leaves can turn yellow and eventually brown.

To fix this issue, it’s important to water your boxwood deeply and regularly, ensuring that the roots receive enough moisture. Proper drainage is also essential to prevent waterlogging and other problems.

3. Nutrient Deficiencies

Nutrient Deficiencies

Nutrient deficiencies, such as a lack of nitrogen, iron, or magnesium, can lead to yellowing of boxwood leaves. This yellowing is a sign that the plant is not receiving enough nutrients from the soil. Applying a balanced fertilizer formulated for boxwood plants is recommended to address this issue.

Follow the instructions on the fertilizer packaging for proper dosage and application. Regularly monitoring soil nutrient levels and providing appropriate fertilization can prevent yellowing and promote healthy growth in boxwood plants.

4. Soil Ph Imbalance Soil Ph Imbalance

One common reason for boxwood leaves turning yellow is a soil pH imbalance. Boxwoods thrive in slightly acidic to neutral soil with a pH between 6.0 and 7.5. If the soil pH is too high (alkaline), it can hinder the plant’s nutrient absorption, resulting in yellowing foliage.

To rectify this issue, you can test the soil pH using a kit and adjust accordingly. Lowering the pH can be done by adding sulfur or iron sulfate to the soil, following the product instructions. Regular monitoring ensures optimal conditions for your boxwood plants.

5. Pest And Disease Infestation

Pest And Disease Infestation

Boxwoods may turn yellow due to infestations by pests such as boxwood leafminer or boxwood mites, which feed on the foliage and cause yellowing or even death if left untreated. Diseases like boxwood blight or root rot can also lead to yellow leaves.

Proper identification and treatment of these pests or diseases are essential for addressing the yellowing problem. Inspecting infected branches and applying insecticides or fungicides effectively prevent and treat boxwood infestations.

Effective Steps To Fix Boxwood Turning Yellow Issue

Effective Steps To Fix Boxwood Turning Yellow Issue

Yellowing leaves in boxwood plants may indicate nutrient deficiencies or disease. To prevent damage and improve plant health, address this issue promptly. Proper watering, fertilization, and soil pH adjustments can help prevent yellowing.

Pruning and removing affected leaves can also enhance the plant’s appearance. Seek professional guidance or use gardening resources to fix and prevent yellowing in boxwood plants for healthy and vibrant shrubs. Here are step-by-step guides to fix the boxwood turning yellow issue

1. Identifying The Problem

Boxwood leaves can be yellowed due to various factors, including nutrient deficiencies, improper watering, pest infestation, or disease. To identify the problem, carefully examine the leaves for discoloration, spots, or damage. Nutrient deficiencies can be addressed by applying a balanced fertilizer formulated for boxwood.

Adjust the watering schedule and ensure proper drainage to prevent overwatering or underwatering. Treat pest infestations with appropriate insecticides or organic methods. Diseases like boxwood blight or root rot may require professional treatment.

2. Adjusting Watering Practices

Yellowing boxwood leaves may indicate overwatering or underwatering. To determine the correct watering schedule, check soil moisture by feeling the top inch and water when it feels dry. Ensure proper drainage and use a well-draining potting mix to avoid overwatering.

Increase watering if underwatering is suspected, but avoid root rot or drought stress. Monitor leaves regularly and adjust watering practices for healthy foliage.

3. Improving Drainage

Improving Drainage

To prevent boxwood lost green, it is important to address poor drainage. Improving the soil’s drainage can help avoid yellowing by ensuring it is well-draining and does not become waterlogged. Adding organic matter like compost to improve the soil structure is one way to enhance drainage.

Additionally, avoiding overwatering and allowing the soil to dry out slightly between waterings can help maintain proper moisture levels. Consider installing a drainage system or raising the planting area to improve drainage if necessary.

4. Addressing Nutrient Deficiencies

Yellowing of boxwood leaves may indicate nutrient deficiencies, such as nitrogen or iron. Conduct a soil test to identify specific deficiencies. Use a nitrogen-rich fertilizer for nitrogen deficiency and iron chelate or iron sulfate for iron deficiency.

Follow recommended application rates and timing instructions on the packaging. Monitor boxwood progress and adjust fertilization as needed.

5. Balancing Soil Ph

Imbalanced soil pH can cause the yellowing of boxwood leaves. The optimal pH range for boxwood is slightly acidic, between 6.0 and 7.5. Test the soil pH with a soil testing kit to ensure it falls within this range. If the soil is too alkaline, lower it by adding sulfur or acidic organic matter like peat moss or pine needles.

If the soil is too acidic, raise the pH by adding lime or wood ashes. Monitor the progress of your boxwood plants as soil pH adjustments can take time.

6. Managing Pests And Diseases

Pests and diseases like Boxwood Leafminer, Boxwood Psyllid, or Boxwood Blight can cause yellowing of boxwood leaves. Use insecticidal soaps or oils to control infestations. Pruning and regular maintenance can prevent disease spread. Remove and destroy infected plants if affected by Boxwood Blight. Regularly inspect for pests or diseases and take appropriate action for healthy boxwood.

7. Preventive Measures For Healthy Boxwood

Preventive Measures For Healthy Boxwood

To ensure the health of your boxwood shrubs and prevent yellowing leaves, you can take several preventive measures. Regularly inspect your plants for signs of pests like mites or diseases like boxwood blight, and promptly address any issues.

Ensure your boxwood receives sufficient but not excessive watering to avoid root rot. Test the soil pH and nutrient levels, adjusting with fertilizers or amendments as needed. Pruning can also improve air circulation and prevent disease spread. Implementing these preventive measures will help keep your boxwood vibrant and healthy.


To maintain the health and aesthetic appeal of your garden, it is essential to address the issue of why my boxwood turning yellow promptly. Identify the underlying problem, which can be caused by factors such as improper watering or drainage issues. Adjusting your watering practices and ensuring adequate drainage can help alleviate these issues.

Yellowing may also be a result of nutrient deficiencies or imbalances in soil pH. Conduct a soil test to determine any deficiencies and adjust your fertilization routine accordingly. Balancing the soil’s pH levels can also contribute to healthier boxwood plants.

Managing pests and diseases is another crucial step in restoring the vibrancy of your boxwood plants. Regularly inspect your plants for any signs of infestation or disease, and take appropriate measures to control them.

Prevention is key in maintaining the health of your boxwood plants. Practice proper watering techniques, provide regular fertilization, and keep your garden environment clean and free from debris that may harbor pests or diseases.

Frequently Asked Questions

Why Is My Boxwood Bush Turning Yellow?

Possible content: Yellowing boxwood bushes can be attributed to nutrient deficiencies, water stress, or pest infestations. Insufficient iron or magnesium in the soil may cause yellow leaves.

What Is The Best Fertilizer For Yellowing Boxwoods?

Choosing the right fertilizer for yellowing boxwoods is crucial. Look for a high-nitrogen fertilizer with a ratio of 10-6-4 or similar. Organic options like compost or manure can also be beneficial. Follow the instructions on the packaging to avoid over-fertilizing.

Can You Save A Dying Boxwood?

Yes, a dying boxwood can be saved with proper care. Identify the cause of the problem, like overwatering or nutrient deficiency. Adjust watering habits, ensure good drainage, and provide balanced fertilization. Prune dead branches and monitor progress closely.

What Does An Overwatered Boxwood Look Like?

Signs of overwatering in boxwood include yellow or brown leaves, droopy or wilted appearance even with moist soil, and root rot leading to stunted growth. To prevent overwatering, ensure proper drainage and water only when the top inch of soil is dry.

Why Is My Boxwood Turning Green To Yellow?

There are several possible causes for boxwood leaves turning yellow. Nutrient deficiencies, overwatering, or pests could be to blame. Inadequate iron or magnesium levels in the soil can lead to yellowing foliage. Overwatering can result in root rot and yellow leaves.

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