Seeing green moss or black mildew on your favorite wooden bench? Don't worry, restoring it is straightforward. The best method combines safety for the wood with effectiveness against organic growth.
First, put on gloves. For light growth, a natural solution works wonders. Mix equal parts white vinegar and water in a spray bottle. Generously spray the affected areas and let it sit for 15-20 minutes. The acetic acid kills the spores. For tougher growth, a oxygenated bleach cleaner (like a powder bleach) is a great wood-safe option. Avoid chlorine bleach as it can damage wood fibers and harm surrounding plants.
After the solution soaks, use a stiff-bristled brush (not wire, which can scratch) to scrub the surface. Always scrub along the wood grain. For deep grooves, an old toothbrush helps. Rinse thoroughly with a garden hose.
For extensive growth, a pressure washer can be effective but must be used with caution. Use a wide 40-degree nozzle and keep it at least 12-18 inches from the wood surface to prevent etching. Always test on an inconspicuous area first.
Once the bench is clean and completely dry—this is crucial—apply a fresh coat of water-repellent wood sealant, stain, or paint. This protective layer is the key to preventing future moss and mildew growth, keeping your bench beautiful for seasons to come.