Termites can quickly destroy wooden outdoor plant boxes, but with the right precautions, you can protect your garden investments. Here are proven methods to keep termites at bay:

1. Choose Termite-Resistant Wood: Opt for naturally resistant woods like cedar, redwood, or pressure-treated lumber, which are less appealing to termites.

2. Apply Protective Coatings: Use wood sealants, varnishes, or borate-based treatments to create a barrier against termites and moisture.

3. Elevate Plant Boxes: Place boxes on concrete, metal stands, or gravel to reduce direct soil contact, a common entry point for termites.

4. Use Natural Repellents: Essential oils like orange oil or neem oil can deter termites. Sprinkle diatomaceous earth around the boxes as a non-toxic solution.

5. Regular Inspections: Check for mud tubes, hollow-sounding wood, or frass (termite droppings) to catch infestations early.

6. Avoid Overwatering: Termites thrive in damp conditions. Ensure proper drainage and avoid excessive watering near wooden structures.

By combining these strategies, you can enjoy durable, termite-free outdoor plant boxes for years to come.