How to prevent eucalyptus outdoor tree boxes from developing surface mold?

Eucalyptus outdoor tree boxes are popular for their durability and natural beauty, but they can develop surface mold over time due to moisture exposure. Here are practical steps to prevent mold growth:

1. Choose Treated or Naturally Resistant Wood – Opt for pressure-treated eucalyptus or naturally mold-resistant varieties to reduce susceptibility.

2. Apply a Protective Sealant – Use a high-quality wood sealant or oil to create a moisture barrier, reapplying annually.

3. Ensure Proper Drainage – Avoid water accumulation by drilling drainage holes and elevating the box slightly.

4. Regular Cleaning – Wipe surfaces with a mild bleach solution (1:10 ratio) or vinegar to kill mold spores.

5. Promote Airflow – Place boxes in well-ventilated areas and avoid overcrowding plants.

By following these tips, your eucalyptus tree boxes will stay mold-free and maintain their appeal for years.