Why winter storage protects your garden investments

British winters are damp, with frosts that creep in overnight and leave everything sodden by morning. Garden furniture and pots left exposed can suffer: wooden slats warp and rot, metal frames rust, and terracotta cracks as water inside freezes and expands. A few hours of autumn preparation will save money, hassle, and the disappointment of a cracked pot or mouldy chair in spring. The job is straightforward, requiring little more than elbow grease, organisation, and an understanding of how water and cold damage your garden kit.

Clean and dry furniture before you cover it

Before covering garden furniture, it must be spotless and bone dry. Dirt, algae, and bird droppings hold moisture against surfaces, encouraging mould and corrosion. Use warm water, mild detergent, and a soft brush to scrub every part, including undersides and joints where grime collects. Rinse well, then dry in the sun or a well-ventilated shed for a full day. If weather prevents this, wipe with an old towel and dry indoors.

Once dry, treat the furniture. Wooden pieces benefit from teak oil or a wood preserver, especially on end grain. Metal frames need rust spots sanded back and touched up with matching paint. Rattan and wicker need a gentle brush to remove debris. Only then cover or store them.

• Never cover damp furniture. Trapped moisture causes more damage than rain.
• Choose breathable covers or cotton sheets. Plastic tarps trap condensation; if used, leave gaps for air.
• Stack chairs carefully to avoid scratches, or store upright if space allows. Remove cushions and store indoors.
• In a shed or garage, raise items off concrete on pallets or battens to prevent damp rising.

Empty terracotta pots to prevent cracking

Terracotta is beautiful but vulnerable. It absorbs water, and when that freezes, it expands with enough force to split the pot in two. The same applies to glazed ceramic pots if water sits in saucer or compost. The simplest prevention is to empty them. Tip compost onto a tarpaulin or wheelbarrow, then scrub with warm soapy water. For white salt deposits, use diluted vinegar. Rinse and dry thoroughly.

Small and medium pots can be stacked indoors, with newspaper between each to prevent chipping. A frost-free shed, garage, or cool spare room works well. If you must leave them outside, turn upside down on bricks so rain runs off, but even empty terracotta can crack in a hard freeze — bringing them under cover is safer. Large pots too heavy to move should be emptied and covered with a board or thick hessian over the top, leaving sides exposed for airflow.

• Remove all soil and roots; even damp compost can expand and crack the pot.
• Clean saucers and store separately to avoid trapping water.
• Check for hairline cracks before storing; they only worsen over winter.

Raise containers onto pot feet for drainage

For pots that stay outside — perhaps holding a hardy shrub or small tree — drainage is everything. Sitting flat on a patio, drainage holes become blocked and water collects in the base. In winter, waterlogged compost freezes solid, killing roots and cracking the container. The solution: raise the pot onto pot feet. These small supports come in terracotta, rubber, or plastic, lifting the base enough for water to drain and air to circulate.

Without pot feet, use bricks, wooden blocks, or flat stones. Ensure the pot is stable and won't topple in winds. Clear debris from drainage holes, and place broken crock or mesh over the hole before refilling to stop it blocking. For extra protection, cluster pots against a house wall, which radiates warmth, and wrap sides with bubble wrap or hessian. Leave the top open for rain, but ensure the pot is not sitting in a water-collecting saucer.

• Pot feet prevent waterlogging and reduce frost damage.
• Group pots for mutual insulation, but don't crowd so much that air can't move.
• Check drainage holes monthly; clear fallen leaves or blockages.

Store everything smartly for a trouble-free spring

With furniture cleaned, dried, and covered, and pots emptied or raised, your garden is ready for winter. If you have a shed or garage, use it — but organise space so air circulates around stored items. Avoid cramming furniture against damp walls. For pots, stack neatly with padding between each, and keep off the floor if possible. If using covers outdoors, check after storms for loose folds or trapped water. A monthly peek will catch problems early, such as mould or a slipped cover.

The effort now pays you back in spring. Instead of scrubbing algae off a chair or hunting a replacement planter, you can sit with a cup of tea and enjoy your garden waking up. A little autumn preparation is the kindest thing for your outdoor furniture and pots — and your future self.