Seeing green moss or black mildew on your favorite wooden park bench? Don't worry, it's a common issue. The best way to tackle it combines thorough cleaning with proper protection. First, put on gloves and safety glasses. For a natural solution, mix equal parts white vinegar and water in a spray bottle. Generously apply it to the affected areas and let it sit for 15-20 minutes to kill the organic growth. Then, use a stiff-bristled brush (not wire, to avoid damaging the wood) to scrub the surface. Rinse thoroughly with a garden hose.
For more stubborn growth, a mild oxygenated bleach solution (following product instructions) is highly effective and safer for wood and surrounding plants than chlorine bleach. Alternatively, a low-pressure power washer can be used carefully from a distance to avoid etching the wood fibers. Always let the bench dry completely for at least 48 hours in sunny weather.
The final, crucial step is prevention. Once dry, apply a high-quality water-repellent wood sealant or stain designed for outdoor use. This creates a barrier against moisture, significantly slowing the return of moss and mildew. Regular visual inspections and a quick sweep or brush-off after wet periods will help keep your wooden benches clean, safe, and beautiful for years to come.