Outdoor rugs collect dirt, pollen, leaves and, if they stay damp, mildew. The good news is that most synthetic outdoor rugs are easy to clean at home. The method depends on the material and on the maker's care instructions, so start there.

This guide covers routine cleaning, deep cleaning by rug type, mildew, drying and storage. For rugs that makers say can go in the washing machine, see Best Washable Outdoor Rugs.

Check the Care Instructions

Makers give very different advice. Some, like SAFAVIEH and Nourison, say their polypropylene rugs can be hosed off. Others allow cold, gentle machine washing for smaller polyester rugs. A few ask for vacuuming and spot cleaning only. Follow the listing or label first.

Routine Cleaning

  • Shake the rug or sweep it with a stiff broom to remove grit.
  • Use a leaf blower for plastic straw rugs.
  • Vacuum woven rugs on a low setting.
  • Lift the rug and sweep the surface underneath, where dirt and moisture collect.

Deep Cleaning by Rug Type

Polypropylene and Plastic Straw

Lay the rug on a clean driveway or lawn, hose it down, scrub with a soft brush and a mild dish soap solution, and rinse thoroughly. JONATHAN Y and CAMILSON both suggest a mild soap and water mix followed by a hose rinse.

Machine-Washable Rugs

Use the cycle and temperature on the label, usually cold and gentle, and air dry. Make sure the rug fits your washer without being crammed in.

Rugs With Rubber or TPE Backing

Avoid hot water and hot dryers, which can damage backings. Rinse and air dry flat.

Dealing With Mildew

Mildew grows where a rug stays damp, often on the underside and on the surface beneath it. Clean both. Scrub the rug with mild soap and water, rinse, and dry it fully in sun and breeze.

For stubborn spots, check whether the maker allows a stronger cleaner or diluted bleach. Do not use bleach on printed polyester or natural fiber rugs unless the maker says it is safe, and always try any cleaner on a hidden corner first. Never mix bleach with ammonia or other cleaners.

Drying Properly

Dry rugs flat in the sun or hang them over a railing so air reaches both sides. Turn them halfway through. A rug that feels dry on top can still be wet underneath, especially with a backing.

Preventing Mold

  • Lift the rug after heavy rain so the surface underneath dries.
  • Move the rug now and then on decks and lawns.
  • Choose unbacked or breathable rugs on wood decks.
  • Roll rugs dry and store them off the ground for winter.

FAQ

Can I pressure wash an outdoor rug?

Some polypropylene rugs can handle a light rinse, but high pressure can fray fibers. A garden hose and soft brush are safer.

How often should I clean an outdoor rug?

Shake or sweep it weekly in season, and deep clean it a few times a year or after spills.

Why does my outdoor rug smell musty?

It is staying damp. Clean it, dry it fully, and lift it after rain.

The Bottom Line

Shake or sweep outdoor rugs often, deep clean them with mild soap and water according to the maker's instructions, and dry them completely. Most mold problems come from rugs and surfaces that never dry, so lifting the rug after rain does as much as any cleaner. See Outdoor Rug Materials Explained and Best Outdoor Rugs.