There a number of ways to prevent box blight in the garden:
- Feed plants moderately since lush, new growth is more susceptible to blight.
- Disinfect tools after using them in one bed or area of the garden before moving to the next.
- Avoid overhead watering since box blight flourishes in humid conditions.
- Mulch the ground under box plants to reduce rain water splash on leaves.
- Isolate newly-purchased box plants for at least 4 weeks before planting. Some sellers use fungicides to surpress blight and other diseases. Isolation gives time for the suppressed disease to manifest.
- Take cuttings from healthy box in the garden to avoid introducing blight from outside sources.
- Regularly inspect box plants for signs of blight, especially in warm, humid conditions.
- Reduce trimming frequency since trimming promotes dense growth which reduces air flow.
- Consider planting box alternatives including Berberis, Elaeagnus, Ilex crenata, Lonicer nitida, Luma apiculata, Osmanthus delavayi, Pittosporum, Podocarpus, Taxus baccata, and Ugni molinae.