By the time the clocks go back, most garden furniture has already been through its worst weeks. Not frost — rain. Wet wood swells and splits, damp cushions grow mildew, and a chip in the paint of a steel frame quietly turns into rust. The good news is that a couple of dry afternoons in September or October will carry most sets through to spring, for the price of a tin of oil and a decent cover. Work through the jobs below in order: clean first, then treat, then cover or store. Anything you wrap up while it is still dirty or damp simply holds the problem in.

Start with a proper clean

Dirt traps moisture against surfaces, which is exactly what you don't want sitting there for four months. Use warm water with a small amount of washing-up liquid, a soft brush for textured surfaces and a microfibre cloth for frames. Rinse with clean water and dry thoroughly with a cloth rather than letting everything air-dry in the shade.

Two things to avoid: a pressure washer on teak, which raises the grain and roughens the surface, and a pressure washer on painted metal, which strips the finish and leaves bare patches to rust. For green or black mildew, use a dedicated garden furniture cleaner, or diluted white vinegar on hard surfaces — test on a hidden spot first. Clear leaves and seed pods out of joints, table extensions and parasol cranks; grit and rotting debris damage moving parts faster than weather does.

Cushions deserve their own attention. Check the care label before anything else. Where covers are removable, most wash at a low temperature and should be air-dried, never tumble-dried. If they are fixed, sponge with mild soapy water, rinse, and dry flat on a rack, turning them once. Be patient: foam can feel dry on the outside while still holding moisture in the middle, and that is what turns into mould in a shed.

Deal with rust before it spreads

Rust is the most common reason metal furniture gets replaced. Powder-coated aluminium corrodes at chips and scratches, and steel or cast-iron frames need an annual inspection, particularly at the feet, castors, bolts and the inside of tubular legs where water collects.

For a small rust spot: sand or wire-brush back to bare metal, wipe clean, apply a rust converter or metal primer, then two thin coats of matching paint, overlapping the edges slightly. Let each coat cure as the label advises. If you are replacing fixings, stainless steel is worth the extra. A light spray of silicone or machine oil on hinges, threads and locking bolts keeps recliners and extenders working, but wipe off any excess that would transfer to hands or clothing.

Keep metal feet off bare soil and out of standing water. Rubber or plastic feet caps help, as does standing everything on paving, bricks or a gravel tray rather than a damp lawn. Work with gloves in a ventilated space when using converters and oils, and follow the product instructions.

Choose and fit the right cover

A cover is cheap insurance, but only if it breathes and fits properly. A plastic tarpaulin over a table can do more harm than leaving it bare, because condensation forms underneath and has nowhere to go.

• Breathable fabric with vents so moisture vapour can escape.
• Taped or welded seams, which resist water far better than stitched ones.
• A drawcord, straps or an elasticated hem to stop the cover flapping and lifting in wind.
• A raised centre or support pole so rain runs off instead of pooling.
• The right size — snug, but not stretched so tight that it pulls the seams.

Fit matters as much as fabric. If a cover sags, water gathers in the dip and eventually finds a way through, so prop the middle of a table with a broom handle or an upturned bucket to create a peak. Check covers after storms, empty any slack and re-tighten the straps. Let furniture air for an hour in dry weather before covering it, and slip the parasol canopy off its frame for storage rather than leaving it furled and damp. If your set came with a warranty, read the care conditions first — some specify a particular cover or advise against covering altogether.

Treat and feed wooden furniture

Wooden sets fall into two rough groups. Oily hardwoods such as teak and iroko can be left to weather to a silver-grey; it is a colour change, not a failure. If you prefer to keep the honey tone, clean with a two-part cleaner and brightener, then apply teak oil or a dedicated sealer in thin coats, wiping off the excess so it doesn't dry tacky. Plan on treating before winter and again in spring.

Softer woods such as pine, acacia and eucalyptus — often factory-oiled — need an annual feed to stop them drying, cracking and greying. Brush off any mould first with diluted vinegar or a mould cleaner, let the wood dry completely, then oil. Work in dry conditions, ideally above about 10°C, on dry timber, and allow a day between coats. Don't apply oil over varnish or lacquer; it won't soak in and will sit on the surface. Avoid engine oil and silicone furniture polish, and never mix finishes on the same piece. Tighten bolts and screws now, and check them again after the first cold snap, because wood shrinks as it dries and joints work loose.

Store what you can, and store it well

Cushions, parasols and textiles will always last longer indoors. For everything else, a dry, ventilated space beats a sealed one.

1. Choose a shed, garage or sheltered corner rather than a sealed plastic box.
2. Raise items off the floor on pallets, bricks or shelving.
3. Stack chairs with cloth or cardboard between them so frames don't rub.
4. Keep cushions and parasol fabric indoors in a breathable bag, not a vacuum-sealed one.
5. Leave a gap between furniture and walls, as damp travels through masonry.
6. Check everything once a month for mould, leaks and mice.

If space is tight, wall hooks for stacking chairs, a folding table tucked behind a shed door or a small ventilated storage box can work well. Just don't cram things in so tightly that air can't move. Gas patio heaters and cylinders should be stored upright, outdoors, away from heat and ignition sources, following the supplier's guidance — never indoors.

Your pre-winter routine

Book one dry afternoon, work from clean to covered, and don't rush the drying stage. Clean and dry everything completely, treat wood while the temperature is still on your side, touch up any rust spots, then cover or store. Once the worst of the weather arrives, a five-minute check after each storm — emptying pooled water, re-securing straps, glancing under covers for damp — will catch most problems early.

And if you do nothing else, take the cushions in. Everything else on this list is maintenance; that one is the difference between using your furniture again in April and shopping for a replacement set.

Photo: Connoman / Pixabay