White mildew on outdoor furniture cushions is a common problem caused by moisture and lack of airflow. To effectively remove it, start by taking the cushions outside to prevent spreading spores indoors. Create a cleaning solution using equal parts white vinegar and water, or mix two tablespoons of baking soda with one quart of water. For tougher cases, a diluted bleach solution (one cup bleach to one gallon water) can be used, but test on a small area first.
Apply your chosen solution with a soft brush, scrubbing gently to lift the mildew stains. Allow the solution to sit for 10-15 minutes to penetrate the mold. Rinse thoroughly with a garden hose and let the cushions dry completely in direct sunlight, which helps kill remaining spores.
To prevent future mildew growth, store cushions in a dry place when not in use, consider using waterproof covers, and clean them regularly throughout the season. Ensure proper airflow by not stacking cushions when stored and using breathable storage solutions. For persistent mildew problems, commercial mold removers designed for outdoor fabrics can provide additional cleaning power.
Regular maintenance and prompt attention to moisture will keep your outdoor cushions looking fresh and extend their lifespan significantly.