Outdoor cushions in Toronto's humid summers are prone to mould, mildew, and general grime. A thorough clean each spring and fall keeps them looking good and extends their life.
Basic Clean (Light Dirt and Grime)
- Brush off loose debris with a soft brush
- Mix 1 tablespoon dish soap with 1 litre of warm water
- Scrub both sides of the cushion with a soft brush or cloth
- Rinse thoroughly with a garden hose — residual soap left in the fabric attracts dirt
- Stand cushions on edge to drain and dry in the sun — allow to dry completely before storing or using
Removing Mould and Mildew
- Mix 1/4 cup white vinegar with 4 cups warm water (or use a diluted oxygen bleach solution for white/light cushions)
- Apply to the mouldy areas and scrub with a stiff brush
- Let it sit for 15 minutes
- Rinse thoroughly and dry completely in direct sunlight — UV light kills mould spores
For stubborn mould on white or light-coloured fabrics: mix 1/4 cup bleach with 4 cups water, apply, let sit 10 minutes, rinse well. Test in a hidden spot first — bleach can fade coloured fabrics.
Machine Washable Covers
Many outdoor cushion covers have zippered removable covers designed for machine washing. Check the care label — most are machine washable on a gentle cycle in cold water. Air dry rather than tumble dry to prevent shrinkage.
Winter Storage
- Clean and dry cushions completely before storing — storing damp cushions guarantees mould by spring
- Store in a breathable storage bag or container in a dry location — a sealed plastic bin traps moisture
- If storing outside under a deck, ensure they are elevated off the ground and in a waterproof cover that allows some airflow