Why Are Your Boxwood Plant Leaves Turning Yellow:
Causes and Solutions

Boxwood plants are a popular choice for landscaping due to their evergreen foliage, compact size, and ability to be shaped into various forms. However, one common issue that boxwood owners face is the yellowing of the leaves. This can be alarming for those who have invested time and effort into maintaining their plants. In this article, we will discuss the causes and solutions for yellowing boxwood leaves.

Causes of Yellowing Boxwood Leaves

1. Overwatering

One of the most common causes of yellowing boxwood leaves is overwatering. Boxwoods require well-draining soil, and excessive watering can lead to waterlogged roots, which can cause root rot. This can result in the yellowing of the leaves.

2. Underwatering

On the other hand, underwatering can also cause yellowing leaves in boxwood plants. If the soil is too dry, the plant will not receive enough water and nutrients, leading to stress and leaf discoloration.

3. Nutrient Deficiency

Boxwoods require certain nutrients to thrive, including nitrogen, phosphorus, and potassium. A deficiency in any of these nutrients can cause yellowing leaves. This can occur if the plant is growing in poor-quality soil or if it has not been fertilized properly.

4. Pests and Diseases

Yellowing leaves can also be a sign of pests or diseases affecting the plant. Some common pests that attack boxwoods include mites, leafminers, and psyllids. Diseases such as boxwood blight and root rot can also cause leaf discoloration.

Solutions for Yellowing Boxwood Leaves

1. Proper Watering

To address issues with overwatering or underwatering, it is important to ensure that your boxwood plant receives the appropriate amount of water. Test the soil regularly to see if it is dry before watering. Make sure that the soil has good drainage and does not stay waterlogged for extended periods of time.

2. Nutrient Management

If a nutrient deficiency is suspected, consider fertilizing your boxwood plant with a balanced fertilizer. You can also amend the soil with organic matter to improve its quality.

3. Pest and Disease Control

If pests or diseases are causing yellowing leaves, it is important to take action quickly to prevent further damage. Consider using insecticides or fungicides as necessary, or consult with a professional landscaper for assistance.

FAQ

Q: Can I save my boxwood plant if its leaves have already turned completely yellow?

A: It depends on the severity of the issue. In some cases, yellowed leaves can be a sign that the plant is already beyond saving. However, if caught early enough, addressing the underlying cause of the yellowing leaves may allow the plant to recover.

Q: How often should I fertilize my boxwood plant?

A: Boxwoods should be fertilized once or twice per year, typically in early spring and late fall.

Q: Can I prune my boxwood plant if its leaves are turning yellow?

A: Yes, pruning your boxwood plant can help encourage new growth and improve its overall health. However, make sure to disinfect your pruning tools before and after use to prevent the spread of any diseases.

Q: Should I remove all of the yellowed leaves from my boxwood plant?

A: Yes, removing yellowed leaves can help prevent further spread of disease or pest infestations. Make sure to dispose of them properly to prevent contamination of other plants in your garden.

In conclusion, yellowing boxwood leaves can be a sign of various issues affecting your plant’s health. By identifying the underlying cause and taking appropriate action, you can help your boxwood thrive and maintain its lush green foliage.