Dealing with mildew on outdoor cushions can be frustrating, but with the right techniques and products, it is possible to remove it and prevent it from coming back. Mildew thrives in damp, humid environments and can quickly spread across the fabric of patio furniture cushions left outdoors. While bleach is a common household cleaner, it can damage and discolor outdoor fabric. Instead, try some of these methods to safely and effectively eliminate mildew from outdoor cushions.

Why Mildew Grows on Outdoor Cushions

Outdoor cushions provide the perfect environment for mildew growth. Mildew is a type of mold that manifests as black or gray spots or stains on fabric. Here are some key reasons why mildew readily grows on outdoor cushions:

Moisture – Mildew needs a damp environment to proliferate. Outdoor cushions often get wet from rain, sprinklers, morning dew etc. If moisture gets trapped in the cushion, it creates optimal conditions for mildew.
Humid Conditions – Warm, humid climates encourage mildew growth. The hot sun beating down on damp cushions speeds up mildew formation.
Lack of Sunlight – Shaded areas prevent sunlight from drying out cushions fully. Lingering moisture allows mildew to thrive. Stacked or covered cushions stay damp longer.
Organic Materials – Natural cushion fillings like cotton provide food for mildew to grow. Synthetic fills like polyester have fewer nutrients.
Dirt Buildup – Soil, pollen, dirt etc. on cushions can provide nutrients for mildew. Regular cleaning prevents this.

Knowing the causes helps prevent and eliminate mildew more effectively.

How to Remove Mildew from Outdoor Cushion Covers

Outdoor cushion covers require special cleaning methods to remove stubborn mildew without damaging the fabric. Follow these steps to clean mildew off cushion covers:

Inspect All Sides of Cushion

Examine both sides of the cushion cover to gauge the extent of mildew growth. Heavily stained areas may need extra attention. Make note of any stubborn spots or stains.

Shake Off Loose Debris

Shake the cushion cover vigorously to dislodge any loose dirt or debris. This prevents grinding it into the fabric while cleaning.

Pre-treat Heavy Stains

For cushions with extensive mildew stains, pre-treat heavily stained areas with a mildew stain remover. Spray or wipe cleaner directly onto stains.

Let it soak for 5-10 minutes before washing. This helps loosen up stubborn mildew.

Wash with Bleach-Free Detergent

Wash cushion covers in the washing machine with bleach-free detergent. Use a gentle cycle with cold water to protect the fabric.

Vinegar is a natural disinfectant and can be added to the detergent. Avoid using bleach as it can damage fabric.

Air Dry Thoroughly

Never put outdoor cushions in the dryer. Heat can ruin the fabric. Always air dry cushion covers fully in direct sunlight before replacing on cushions.

Proper drying inhibits mold regrowth. Turn covers inside out periodically while drying for even drying.

Repeat Process if Needed

Check if any mildew stains remain after washing. Spot clean these areas with mildew remover and wash again if needed. Severe mildew buildup may require multiple cleaning sessions.

With some scrubbing and the right cleaning products, cushion covers can be restored to a like-new condition.

Cleaning Mildew Off Outdoor Cushion Foam

While cushion covers can be removed and washed, the cushion foam and filling require special treatment to remove mildew. Here are some safe ways to clean mildew from cushion foam:

Vacuum Thoroughly

Use a vacuum cleaner to suck up all loose dirt, debris and surface mildew from the cushion foam. Get into crevices and seams.

Vacuuming removes mold spores and improves the efficacy of other cleaning methods.

Spot Clean With Vinegar-Water

Create a natural cleaning solution by mixing one part white vinegar with one part water. Dip a soft cloth in this and wipe down any visible mildew spots or stains on the cushion foam.

Vinegar is a natural disinfectant that kills mold and mildew. Avoid scrubbing too hard on the cushion foam.

Disinfect With Borax Solution

For thicker mildew growth on cushion foam, make a borax solution. Mix 1/2 cup borax powder with one gallon of water until dissolved.

Wipe this solution onto affected areas of cushion foam using a sponge or cloth. This inhibits further mold growth.

Let Air Dry Completely

After cleaning, allow the cushion foam to dry fully in the sun before replacing the cover. Rotate it periodically for even drying.

Trapped moisture allows mildew to return. So thorough drying is essential.

With these methods, both the cushion covers and foam can be cleaned without damaging the material.

How to Remove Mildew Smell from Cushions

Even after removing visible mildew stains, cushions can retain a musty smell if mildew has penetrated deep within the material. Here are some handy ways to get rid of that stubborn mildew odor from cushions:

Sprinkle baking soda generously on the cushion surface and let sit overnight before vacuuming up. The baking soda absorbs odors.
Stuff dryer sheets or newspaper inside the cushion foam and leave for 1-2 days. This absorbs moisture and odor.
Spray vinegar water solution onto the foam and let air dry in the sun. The vinegar smell dissipates as it dries.
Spot clean any remaining stains with hydrogen peroxide or tea tree oil. Their antiseptic properties remove odors.
For removable covers, add 1/2 cup baking soda to the washing machine during the rinse cycle.

With time and patience, even severe mildew odors can be eliminated from cushions.

How to Prevent Mildew Growth on Outdoor Cushions

Prevention is better than cure when it comes to mildew on patio cushions. Here are some mildew prevention tips for outdoor cushions:

Bring cushions indoors after use or invest in water-resistant cushion covers. This shields them from moisture.
Vacuum cushions frequently to remove surface dirt, debris and spores.
Alternate cushions in storage to allow them to dry out fully before next use.
Spray hydrogen peroxide, tea tree oil or vinegar solution on cushions to inhibit mold.
Sprinkle baking soda or borax powder in cushion crevices. Their antifungal properties prevent mildew.
Add a moisture absorber like silica gel packs in cushion covers when storing.
Hose down outdoor furniture with diluted bleach solution before placing cushions.
Ensure outdoor cushions get adequate sunlight and airflow. Rotate their position periodically.

With vigilant care and timely cleaning, outdoor cushion can be protected from recurring mildew issues.

Common Questions about Removing Mildew from Outdoor Cushions

Here are answers to some frequently asked questions about eliminating mildew from outdoor cushions:

Can I use bleach to remove mildew from outdoor cushions?

Bleach is harsh and can damage or discolor outdoor cushion fabric, so it should be avoided. For whitening or stubborn stains, opt for oxygen bleach instead as it is gentler on fabrics.

How do I get rid of mildew smell from outdoor cushions?

Try sprinkling baking soda, stuffing cushions with newspaper or spraying vinegar solution. For removable cushion covers, add baking soda to the washing machine rinse cycle. Thorough drying in the sun also helps dissipate odors.

What temperature should I wash mildewy outdoor cushions?

Always use cold water when machine washing outdoor cushion covers. Hot water can damage or shrink the fabric. Warm water at most can be used for very soiled cushions.

Can I put outdoor cushions in the dryer after washing?

Never machine dry outdoor cushions or their covers. The heat destroys these materials meant for outdoor use. Always let them air dry fully in direct sunlight before use or storage.

How can I prevent mildew from returning to outdoor cushions?

Bring cushions indoors when not in use. Hose down outdoor furniture regularly. Allow ample sunlight and airflow. Use baking soda, vinegar or hydrogen peroxide to inhibit microbial growth. Rotate cushions during storage for even drying.

Conclusion

Mildew can quickly ruin the look and feel of prized outdoor cushions. But with some basic cleaning techniques using natural ingredients like vinegar and borax, you can eliminate those unsightly stains and musty odors. Be sure to thoroughly dry all cushions after washing. And take preventative measures like rotating cushions or using moisture absorbers when storing to avoid repeated mildew issues in the future. With regular care and prompt treatment, your outdoor cushion can stay free of microbial growth for many seasons.

How to Remove Mildew from Outdoor Cushions: A Quick Step-by-Step Guide

Dealing with mold and mildew on outdoor cushions? Don’t worry – with some handy household products and a few easy steps, you can get rid of it in no time!

Here is a quick step-by-step guide to removing mildew from outdoor cushions:

Step 1: Inspect and Air Out the Cushions

Examine your cushions closely, both inside and out. Look for black or gray spots indicating mildew growth. Also check for musty odors. Air cushions out in direct sunlight to dry damp areas and make cleaning easier.

Step 2: Vacuum the Cushions Thoroughly

Use a vacuum cleaner to remove loose dirt, debris and surface mold from the cushions – including crevices and seams. This prepares them for further cleaning.

Step 3: Wash Removable Covers

For cushion covers that can be removed, wash them in the machine with detergent and cold water. Add 1/2 cup vinegar to help disinfect. Let air dry completely before re-fitting.

Step 4: Spot Clean Stains on Foam

For stubborn spots on cushion foam, dab hydrogen peroxide, vinegar water or borax solution. This lifts stains without damaging the foam.

Step 5: Disinfect Cushion Foam

Wipe down cushion foam thoroughly with a vinegar-water solution (1:1 ratio) or borax solution (1/2 cup borax per gallon of water) to kill mold.

Step 6: Fully Dry Cushions

Always allow cushions to dry completely before replacing covers or using again. Rotate periodically for even drying. Trapped moisture encourages mildew regrowth.

Step 7: Maintain and Prevent

Keep cushions clean, dry and aired out. Use baking soda between washes to inhibit microbial growth. Bring cushions indoors when not in use.

And that’s it! With minimal time and effort, you can get outdoor cushions looking fresh and clean again. Just be sure to act at the first sign of mildew to prevent worsening.

Common Cleaning Agents to Remove Mildew from Outdoor Cushions

Cleaning mildew off outdoor cushions requires using the right products for optimal results. Here are some of the best cleaners and stain removers to use:

Vinegar

A staple cleaning product, vinegar is naturally antibacterial and antifungal. Mix equal parts white vinegar and water and wipe down cushions to clean and disinfect. Rinsing with vinegar also removes soap residue after washing.

Borax

The antifungal properties of borax make it effective at killing mold and mildew. Make a solution by dissolving 1⁄2 cup borax in 1 gallon of warm water. Dip a sponge in this solution and wipe cushions. Rinse off thoroughly.

Hydrogen Peroxide

As a mild bleach, hydrogen peroxide whitens stained areas and removes odors. Spot test first before applying it directly onto discolored patches of fabric or cushion filler with a cloth. Rinse after 5 minutes.

Baking Soda

A natural deodorizer and cleaning powder, baking soda can be directly sprinkled on cushion surfaces to absorb odors and moisture. Let sit overnight before vacuuming off. It also freshens cushion fills when added to the washing machine.

Oxygen Bleach

As an alternative to harsh chlorine bleach, oxygen bleach is gentler on outdoor cushion fabrics. Check the care label instructions before adding it to wash cycles for whitening and stain removal.

Lemon Juice

The acidic lemon juice breaks down the mildew and its musty odors. Mix lemon juice and salt and rub onto stained areas before placing cushions in direct sunlight to dry and bleach out stains.

Using the right cleaning solutions prevents damage and optimizes the removal of mildew and stains from outdoor cushions.

Tips for Preventing Mildew Growth on Outdoor Cushions

Once you have cleaned all the mildew off your outdoor cushions, here are some handy tips to prevent mold and mildew growth returning:

Store cushions indoors or invest in water-resistant cushion covers for rainy seasons. Keeping cushions dry prevents dampness and mold.
Vacuum both sides of cushions regularly to remove dirt, pollen and other debris that encourages microbial growth.
Allow cushions to dry out fully in direct sunlight before stacking or storing. Rotate their position for even drying.
Spray hydrogen peroxide, vinegar or tea tree oil solution on cushions to inhibit microbial growth. These solutions are safe for outdoor fabrics.
Place silica gel packs in cushion covers when storing cushions. Silica absorbs excess moisture preventing mold.
Sprinkle borax powder or baking soda in cushion crevices and surfaces before storage. These act as natural fungicides.
Hose down outdoor furniture with a diluted bleach solution before placing freshly cleaned cushions back on.
Check for mold growth under cushions as well as on surfaces and promptly treat affected areas.
Ensure cushions are not bunched up tightly when in use or storage. Allow for ample airflow.

With consistent care and quick treatment at first signs of mildew, you can avoid recurring issues with persistent mold on your prized patio cushions.

How to Remove Different Types of Stains from Outdoor Cushions

Outdoor cushions are prone to more than just mildew stains. Food, grease and general dirt can also discolor and damage outdoor fabric. Here are some tips to remove common stains:

Food Stains

Dab the stained area immediately with a damp cloth to remove any food debris. Avoid rubbing it in. Once dry, apply a baking soda and water paste. Let sit for 15 minutes before rinsing. Wash normally.

For tough grease stains, spray WD-40 before washing. The oil helps break down the grease.

Drink Stains

Blot the spill right away with an absorbent cloth. Avoid rubbing it in. For wine stains, dab some salt on the spot to help draw out the moisture.

Make a paste with dish soap and hydrogen peroxide and work it into the stain before washing as normal.

Bird Droppings/Tree Sap

Let the stain dry completely. Use a dull knife to scrape off any excess and loosen stiff stains. Apply rubbing alcohol to help dissolve the stain, rinse and wash.

Dirt/Grime

Make a paste of baking soda and water and scrub into dirty areas using a soft brush. Let sit 10 minutes before rinsing clean. Vinegar can also help cut through grime buildup.

Sunscreen/Oil

Use paper towels to blot up any excess oil or sunscreen. Then sprinkle the stain generously with baby powder or cornstarch. Let sit for an hour before brushing off and washing.

With prompt treatment and cleaning agents on hand, even tough stains on outdoor cushions can be tackled effectively. Be sure to check cushions regularly as part of routine maintenance. Address any stains quickly before they have a chance to set in and cause permanent damage.

How to Winterize Outdoor Cushions and Prevent Mildew

Colder months bring unique challenges when it comes to protecting outdoor cushions. Here are some tips on winterizing cushions:

Clean Thoroughly Before Storing

Inspect cushions closely and clean any mildew or stains found. Wash covers, spot clean foam and allow to dry completely before storage to avoid mold growth.

Air Out Indoors Before Use

When getting cushions out for occasional winter use, let them air out indoors for 48 hours first. This allows any musty smells from storage to dissipate.

Use Breathable Garment Bags

Place clean, dry cushion covers in breathable garment bags before storing for the winter. Avoid plastic bags that trap moisture. Add cedar blocks or silica gel packs to bags.

Store Cushion Foam Indoors

If possible, take cushion foam indoors e.g. a basement or garage for winter storage. A cold, damp shed or outdoor storage can encourage mold.

Keep Storage Areas Clean and Dry

Ensure storage areas are clean, dry and well-ventilated. Open windows periodically over winter during sunny, dry days. Monitor for any mold outbreaks.

Check on Cushions Periodically

Inspect stored cushions once a month or so over winter. If any moisture or mildew is found, clean and dry immediately before replacing into storage.

With proper care before storage and during occasional winter use, outdoor cushions can stay fresh and mold-free all through the colder months.

FAQs about Cleaning Mildew from Outdoor Cushions

Q: How do I get mildew smell out of outdoor cushions?

A: Try stuffing cushions with newspaper or dryer sheets to absorb odors. Also sprinkle baking soda generously before vacuuming up. For removable covers, add baking soda to the washing machine rinse cycle. Letting cushions air and dry in direct sunlight helps too.

Q: Can I use bleach to clean outdoor cushion covers?

A: Avoid using harsh chlorine bleach as it can damage and discolor outdoor fabric. For whitening, use oxygen bleach instead and check care label instructions first. Or try soaking in lemon juice and sunlight.

How to Get Mildew Out of Outdoor Cushions