Getting Ahead of the First Frost

The first proper frost rarely announces itself. One morning the lawn is crisp, the greenhouse glass is patterned with ice, and the tender plants you meant to move last weekend are looking distinctly sorry for themselves. A few focused afternoons in autumn can spare you a great deal of that heartache. The trick is not to try to do everything at once, but to work through your garden in a sensible order: soil and beds first, then containers, then anything that might snap, crack or freeze solid when temperatures drop below zero.

Look After the Soil and the Beds

Winter is hard on bare soil. Heavy rain compacts it, frost lifts it, and nutrients wash away down the slope. A generous layer of mulch acts like a duvet, keeping soil temperature steadier and protecting the roots and worms beneath.

• Spread well-rotted manure, compost or bark chippings 5–8cm deep over borders, but leave a small gap around stems and trunks so nothing rots at the base.
• Leave faded seedheads on teasels, sedums and ornamental grasses. They look lovely rimed with frost and feed the birds through the lean months.
• Clear fallen leaves from the lawn and pond, but don't be too tidy. A leaf pile in a quiet corner makes an excellent hedgehog hibernation spot.
• Plant spring bulbs now while the ground is still workable. Tulips can go in as late as November and will thank you for it.
• Lift any tender tubers such as dahlias and cannas once the foliage has blackened, dry them off and store them somewhere cool and frost-free in dry compost or newspaper.

Protect Your Pots and Containers

Terracotta and glazed pots are among the biggest casualties of a hard winter, because wet compost expands as it freezes and can split the pot clean open. Roots suffer too, especially in small containers where there's little soil to buffer the cold.

• Raise every pot onto pot feet, bricks or timber battens so water drains freely instead of pooling underneath.
• Group pots together against a house wall or in a sheltered corner. Clustering traps warmth and blocks the worst of the wind.
• Wrap terracotta and ceramic pots in bubble wrap, hessian or an old blanket, secured with twine. Wrap the pot, not the plant's crown.
• Move the most vulnerable containers into a greenhouse, porch or unheated garage before the first hard frost.
• Cut back on watering. Damp compost in a cold pot is far more damaging than dry compost. Water sparingly, and only on mild days.
• For plants left outside, a double layer of horticultural fleece over the top will see most of them through. Remove it on sunny days so they don't cook.

Prune With Care, Not Enthusiasm

Autumn is the wrong time for a hard prune. Cutting back vigorously encourages soft new growth that won't harden before the cold arrives, leaving the plant exposed to dieback. What you can do is tidy, thin and secure.

• Remove dead, damaged and diseased wood back to a healthy bud or branch, using clean, sharp secateurs.
• Shorten long, whippy stems on roses and buddleia by roughly a third to stop wind rock loosening the roots. Save the proper prune for spring.
• Thin congested shrubs so snow and wind pass through rather than piling up and splitting the framework.
• Tie in climbers and wall shrubs, and check tree ties. Give trunks room to move — a tie that's too tight can strangle a tree as it grows.
• Leave lavender, rosemary and other Mediterranean herbs alone until late spring. Cutting them now often kills them.

Insulate Taps, Pipes and Other Vulnerable Fixtures

A burst outdoor pipe is an expensive way to learn about frost. Water expands as it freezes, and the damage usually shows up only when things thaw.

• Find the isolating valve for your outdoor tap and turn it off. Open the tap outside to drain any water left in the pipe, then close it again.
• Fit foam pipe lagging to any exposed run of pipe, and wrap a purpose-made insulated tap cover over the spout. A thick sock and a plastic bag tied over the top works surprisingly well in a pinch.
• Lag pipes in unheated garages, sheds and loft spaces too — that's where many winter bursts actually happen.
• Disconnect and drain hosepipes and sprinklers, coil them up and store them indoors or in a frost-free shed.
• Keep lids on water butts to stop them filling with leaves, and check the overflow is clear before the heavy rain arrives.

Check Structures and Give Wildlife a Hand

Winter gales find every loose panel and wobbly fence post. Spend an hour with a screwdriver and a ball of twine before the weather turns.

• Replace broken greenhouse panes and check glazing clips, vents and door catches. Secure cloches and cold frames so they don't take off in a storm.
• Clear gutters, downpipes and drains so meltwater has somewhere to go.
• Firm back any plants lifted by frost heave, but avoid walking on frozen or waterlogged soil.
• Top up bird feeders and keep a shallow dish of unfrozen water available — birds need to drink as much as they need to eat.
• Stack a few logs or leave a patch of long grass in a corner as shelter for insects, frogs and hedgehogs.

Do these jobs in the soft, golden weeks of late autumn and your garden will come through winter quietly intact, ready to reward you the moment spring arrives.