Can Garden Furniture and Cushions Be Left Outside?

Most garden furniture can be left outside all year, but cushions should not be. Teak, powder coated aluminium and good quality resin wicker all cope with British weather without shelter, while steel framed sets, softwood and anything with fabric or upholstery need protection. Cushions are the weak point in almost every set: even water resistant outdoor fabric absorbs damp over weeks of rain, and once moisture reaches the foam core, mildew follows.

The practical answer for most UK gardens is to leave the frames out with a breathable cover and store the cushions in a nearby waterproof box. That combination is low effort and removes the two things that actually shorten a set’s life: standing water and trapped damp.

Furniture That Copes Outdoors

Teak is the strongest performer. Its natural oils and dense grain resist rot, insects and water without any treatment, and it can stay out through frost and rain indefinitely. It will fade to a silver grey, which is a surface colour change rather than damage.

Powder coated aluminium is equally reliable because aluminium does not rust. The only vulnerability is the coating: chips expose bare metal which will corrode superficially, so touching up damage keeps it looking tidy.

Good quality resin wicker, specifically UV stabilised HDPE weave over an aluminium frame, handles British weather well. It does not absorb water and mould grows only on the surface where it can be washed off. Lower grade PVC weave becomes brittle in frost and is better stored over winter.

Stone, concrete and slate tables are unaffected by weather, though they can stain and they are heavy enough that moving them is rarely practical anyway.

Furniture That Needs Protection

Steel framed furniture, including much of the cheaper bistro and dining range, will rust wherever the coating fails. Rust spreads under paint and is difficult to arrest once established, so steel benefits from covering or storage.

Softwood such as pine and untreated deal absorbs water readily, swells, splits and eventually rots. If it must stay out, it needs an annual coat of exterior wood preservative and should not sit directly on wet paving.

Glass table tops are safe from water but vulnerable to storms. Toughened glass can be lifted by high wind if it is not clamped down, so removing or securing it before winter is sensible.

Anything upholstered belongs indoors. Fully upholstered outdoor sofas that are becoming popular in garden rooms are not designed for permanent exposure, and neither are parasols, which should be closed and ideally stored between uses. Our modern garden parasols UK sale range includes designs with covers for exactly this reason.

Why Cushions Are the Real Problem

Outdoor cushion fabric is water resistant, not waterproof. It sheds a shower well but absorbs moisture over sustained rain, and British weather supplies plenty of that.

The critical issue is the foam core. Once damp reaches the inner filling, it dries very slowly because air circulation inside a compressed cushion is poor. A cushion can feel dry on the surface while remaining wet inside for days, and that is where mildew develops.

Mildew is not only unsightly. It produces a persistent smell, stains the fabric permanently in places, and can degrade stitching. Removing established mildew from outdoor fabric is difficult, and the safe cleaning methods that do not damage water resistant coatings are the least effective ones.

Sunlight causes the other kind of damage. UV exposure fades cushion fabric noticeably faster than it affects furniture frames, and prolonged exposure weakens the fibres so seams begin to fail. A cushion left out all summer will look older than one used just as often but stored between uses.

Quick drying reticulated foam, used in higher specification outdoor cushions, improves matters significantly because water passes straight through. It is worth looking for, but it does not make permanent outdoor exposure a good idea.

Covers That Help and Covers That Harm

A good cover extends the life of garden furniture considerably. A bad one accelerates its decline.

The essential feature is breathability. A sealed plastic sheet stops rain but traps evaporating ground moisture underneath, creating a humid pocket that encourages mould on both furniture and cushions. Covers with breathable panels or vents allow that moisture to escape.

Fit matters next. A cover that flaps in the wind abrades the finish beneath it and eventually tears. Look for a drawstring hem, elasticated edges or corner straps so it stays taut.

Water should run off rather than pool. A cover that sags in the middle collects rainwater, and the weight of that water will stretch the cover and can bow a table top. Placing something under the cover to create a peak in the centre solves this simply.

Cover only dry furniture. Putting a cover over a wet set seals moisture in and is one of the most common causes of mould appearing under covers.

Storage That People Actually Use

The best storage solution is the one closest to the furniture. A cushion box two steps from the sofa gets used every evening. A shed at the bottom of the garden does not.

Waterproof cushion boxes are the practical middle ground, and many double as a bench or side surface so they earn their footprint on a small patio. Look for a lid with an overhanging edge or a seal, gas struts so the lid stays open, and drainage or a raised base so the interior stays dry. Our modern garden storage UK sale range covers these designs.

For larger volumes or for storing whole chair sets over winter, a shed or garage is better. Stackable chairs make this realistic in a small space, and folding bistro sets store almost flat. Our modern bistro sets UK sale range includes folding designs suited to small gardens where everything has to be put away.

Whatever you use, store cushions dry and standing on edge rather than stacked flat where possible, so air can circulate between them.

A Seasonal Routine for UK Gardens

In spring, wash the furniture with warm soapy water and a soft brush, tighten all bolts and fixings, touch up any chipped powder coating, and apply teak sealer if you want to preserve golden timber. Check cushion covers for mildew before putting them back into use.

Through summer, bring cushions in or box them overnight and during rain. This single habit does more for their appearance than any cleaning product.

In autumn, give everything a final clean, allow it to dry completely, then either cover the frames or move them into storage. Cushions should be fully dry before they go into a box for the winter, since a damp cushion sealed in a box for five months will not survive it.

Through winter, check covers after storms to make sure they are still secure and that no water has pooled on top. Lift a corner occasionally to look for condensation underneath.

Recovering from Damp and Mildew

If cushions have already been affected, act while the marks are fresh. Brush off surface growth outdoors when dry, then clean with warm water and mild soap using a soft brush, working the whole panel rather than a patch so there is no clean spot left behind.

Avoid bleach on coloured outdoor fabric and avoid strong detergents, both of which strip the water resistant finish and leave the cushion more absorbent than before.

Drying is the part people rush. A cushion needs several dry days, turned regularly, ideally standing on edge in a breeze or in an airy room. Putting a partly dry cushion back into a box guarantees the smell returns.

If mildew has reached the foam, replacing the inner is usually more successful than trying to clean it. Replacement cushions are far cheaper than replacing furniture, and the frames from a well made set will outlast several sets of cushions.

You can find frames, cushions and storage across our full modern garden furniture UK sale collection at Furniture in Fashion, where we offer free delivery to most UK mainland postcodes.

Frequently Asked Questions

Can outdoor cushions be left outside in the rain?

They should not be. Outdoor fabric is water resistant rather than waterproof, and sustained rain lets moisture reach the foam core where it dries slowly and encourages mildew.

Is it safe to leave garden furniture out all winter in the UK?

Teak, powder coated aluminium and quality HDPE resin wicker cope well. Steel framed sets, softwood and lower grade PVC weave are better covered or stored, and cushions should always come indoors.

Do garden furniture covers cause mould?

Non breathable covers can, because they trap evaporating moisture underneath. Choose a cover with vents or breathable panels, fit it only over dry furniture, and prevent water pooling on top.

How do I get mildew smell out of outdoor cushions?

Brush off dry surface growth, clean with warm water and mild soap across the whole panel, then dry thoroughly over several days with air circulating. Avoid bleach and strong detergents on water resistant fabric.

Should I store cushions in a shed or a cushion box?

A waterproof cushion box near the seating is more likely to be used daily, which matters more than capacity. A shed suits winter storage or whole chair sets where space allows.