How to prevent eucalyptus outdoor flower boxes from leaching tannins?

Eucalyptus wood is popular for outdoor flower boxes due to its durability and natural beauty. However, one common issue is tannin leaching, which can cause unsightly stains on surfaces below. Here’s how to prevent it:

1. Seal the Wood: Apply a high-quality wood sealant or waterproofing stain to create a barrier that locks tannins inside.

2. Pre-Treat with Vinegar: Soak the wood in white vinegar before use to help neutralize tannins.

3. Use a Liner: Place a plastic or metal liner inside the flower box to prevent direct contact between soil and wood.

4. Regular Maintenance: Reapply sealant annually and clean the box to remove residual tannins.

5. Choose Treated Eucalyptus: Opt for kiln-dried or pressure-treated eucalyptus, which has reduced tannin content.

By following these steps, you can enjoy the benefits of eucalyptus flower boxes without worrying about tannin stains.