Outdoor furniture is exposed to the elements, making it prone to mold and mildew growth. These fungi not only look unsightly but can also cause health issues and damage materials. The best cleaner depends on your furniture type and the severity of the problem.
For a natural and effective solution, white distilled vinegar is a top choice. Mix equal parts vinegar and water in a spray bottle. Apply it generously to the affected areas, let it sit for at least an hour, then scrub with a stiff-bristled brush and rinse thoroughly with water. Vinegar kills most mold species and is safe for most surfaces, though its strong smell dissipates quickly.
For stubborn mold stains, especially on non-porous materials like plastic or metal, a diluted bleach solution can be highly effective. Create a mixture of one cup of bleach per gallon of water. Always wear gloves and work in a well-ventilated area. Apply the solution, allow it to sit for no more than 10 minutes to prevent material damage, scrub, and rinse completely.
For wood furniture, a gentler approach is recommended to avoid damaging the finish. A solution of mild dish soap and warm water is a good first step. For persistent mildew, a solution of one tablespoon of borax mixed with a cup of water can be effective without being as harsh as bleach.
Several excellent commercial cleaners are also available. Look for EPA-registered, oxygen-based, or "mold-armor" products specifically designed for outdoor use. These are often formulated to be less harsh than DIY bleach solutions while still being powerful.
Regardless of the method, always test your chosen cleaner on a small, inconspicuous area first. Regular cleaning and ensuring your furniture dries completely after rain are the best ways to prevent mold and mildew from returning.