English Boxwood Problems - Common Issues and Solutions

Common Problems

Symptoms: Orange-brown spots on young leaves, brown leaf discoloration, leaf drop, black cankers on stems.

Cause: Fungal disease that spreads in warm, wet conditions, especially with overhead watering.

Fix: Remove and destroy infected leaves and plants. Avoid overhead watering. Improve air circulation by pruning. Use fungicides if needed.

Prevention: Plant in well-drained sites with good airflow. Water at the base, mulch lightly, and space plants to reduce humidity.

Symptoms: Yellowing leaves, poor growth, discoloured woody tissue near the base, dying sections.

Cause: Poor drainage leads to fungal infection of roots.

Fix: Improve soil drainage by amending soil or relocating plants. Avoid overwatering. Remove severely affected plants.

Prevention: Plant boxwoods on well-drained sites or raised beds.

Symptoms: Pinkish fungal growth on leaves and stems, yellowing or dying new leaves, girdling branches, loose bark.

Cause: Fungal pathogen favored by moisture and poor airflow.

Fix: Prune out infected branches, increase airflow, apply appropriate fungicides in early spring.

Prevention: Avoid overcrowding, ensure good airflow, avoid overhead irrigation.

Symptoms: Defoliation, caterpillars on leaves, webbing, general decline.

Cause: Moth caterpillars that feed on leaves.

Prevention: Inspect plants regularly and maintain plant health to resist infestations.

Provide partial shade; avoid full winter sun exposure and harsh winds
Keep soil moist but not waterlogged; water at the base rather than overhead
Mulch lightly to maintain soil moisture and moderate soil temperature
Prune minimally to maintain airflow; avoid heavy pruning that causes thick foliage
Fertilise sparingly; address nutrient deficiencies like iron chlorosis with appropriate supplements

Located 10km southeast of Ballarat at 500m elevation, we understand the specific challenges boxwoods face in cold Victorian winters.

Visit Navigators Nursery for specific advice about boxwood care and problem-solving in your particular Ballarat garden conditions.