Protecting the interior of your wooden planter box is crucial for its longevity and the health of your plants. The best way to seal it involves a combination of a high-quality sealant and a protective liner. First, ensure the wood is clean, dry, and sanded smooth. Apply a generous coat of a non-toxic, waterproof sealant designed for constant soil contact, such as a pond liner sealant or a specialized rubberized coating. Pay extra attention to the corners and seams. For added security, install a durable liner—like a heavy-duty plastic sheet or a pond liner—stapling it in place above the soil line. Always drill drainage holes *through* both the liner and the wood base. This two-layer defense creates a robust barrier, preventing moisture from rotting the wood and protecting the soil from any potential chemical leaching, ensuring your urban garden thrives for seasons to come.
What is the best way to seal the inside of wooden urban planter boxes?
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