Boxwoods are popular evergreen shrubs known for their lush, green foliage and versatility in landscaping. However, if you notice your boxwood turning brown, it can be alarming. Browning can be caused by a variety of factors, from environmental stress to pests and diseases. In this guide, I’ll explain the common reasons why boxwoods turn brown and share six ways to fix the problem right now. Let’s get your boxwood back to its healthy, vibrant self!
1. Winter Burn
Winter burn is a common issue for boxwoods, especially in colder climates.
- Why It Happens: Cold winds, frost, and sun exposure can dry out the foliage, causing it to turn brown.
- How to Fix:
- Protect boxwoods in winter by wrapping them in burlap or applying an anti-desiccant spray.
- Water deeply in late fall to ensure the roots are hydrated before the ground freezes.
2. Drought Stress
Boxwoods need consistent moisture, especially during hot, dry weather.
- Why It Happens: Lack of water causes the leaves to dry out and turn brown.
- How to Fix:
- Water deeply and regularly, especially during dry spells.
- Apply mulch around the base to retain soil moisture.
3. Root Rot
Overwatering or poor drainage can lead to root rot, which causes browning.
- Why It Happens: Soggy soil suffocates the roots, leading to decay.
- How to Fix:
- Ensure the soil is well-draining and avoid overwatering.
- If root rot is severe, consider replanting in a better-draining location.
4. Boxwood Blight
Boxwood blight is a fungal disease that causes brown spots and defoliation.
- Why It Happens: The fungus thrives in humid conditions and spreads through water, tools, or infected plants.
- How to Fix:
- Remove and destroy infected branches or plants to prevent spread.
- Avoid overhead watering and improve air circulation around the plant.
- Apply a fungicide labeled for boxwood blight, following the instructions carefully.
5. Pest Infestation
Pests like boxwood leafminers, mites, or psyllids can cause browning.
- Why It Happens: These pests feed on the foliage, damaging the leaves and causing discoloration.
- How to Fix:
- Inspect the plant for signs of pests, such as tiny insects or webbing.
- Treat with an appropriate insecticide or horticultural oil.
- Prune and dispose of heavily infested branches.
6. Nutrient Deficiency
A lack of essential nutrients can cause boxwoods to turn brown.
- Why It Happens: Poor soil quality or improper fertilization can lead to nutrient deficiencies.
- How to Fix:
- Test the soil to determine nutrient levels.
- Apply a balanced fertilizer or soil amendments as needed.
Preventive Tips for Healthy Boxwoods
- Plant in the Right Location: Choose a spot with well-draining soil and partial to full sun.
- Water Properly: Keep the soil consistently moist but not waterlogged.
- Prune Regularly: Remove dead or diseased branches to improve air circulation.
- Monitor for Pests and Diseases: Inspect your boxwoods regularly and address issues early.
- Mulch: Apply a layer of mulch to retain moisture and regulate soil temperature.
Final Thoughts
Boxwoods are resilient plants, but they can still suffer from browning due to environmental stress, pests, or diseases. By identifying the cause and taking prompt action, you can restore your boxwood’s health and beauty. Whether it’s adjusting your watering routine, treating for pests, or protecting it from winter burn, these six fixes will help you get your boxwood back on track. Happy gardening!
