Hedgehogs are the gardener's quiet ally, snuffling through borders at night in search of slugs, beetles and caterpillars. Yet their numbers have fallen sharply in recent decades. A garden that welcomes them—safely—can become a small but vital refuge. The good news is that it takes only a few thoughtful changes, and many of them make your outdoor space richer for other wildlife too.

Why Hedgehogs Need a Helping Hand

Modern Britain is a tougher place for a hedgehog than it was a generation ago. Fields have been fragmented, hedgerows removed, and gardens fenced in so tightly that a hedgehog may find itself trapped in one small patch with no route to food, water or a mate. Road traffic, tidy lawns and chemical treatments add further pressure. A single hedgehog can travel up to two kilometres in a night, so connectivity between gardens really matters.

The good news is that hedgehogs are adaptable. Give them a safe passage, a wild corner and a shallow dish of water, and they will often become regular visitors. You may not see them—they are nocturnal and shy—but tell-tale droppings, snuffling sounds, or a sudden drop in slug numbers can be signs that one has moved in.

Build a Hedgehog Highway

The single most useful thing you can do is create a gap in your boundary. A hedgehog needs a hole roughly 13 centimetres square—about the size of a CD case—at ground level. If you have a solid fence, cut a notch in the bottom of a panel or lift a gravel board slightly. For a brick wall, a tunnel made from a length of drainpipe or a purpose-built hedgehog hole works well. Check with neighbours first, and encourage them to do the same. A continuous network of small gaps turns a row of separate gardens into a genuine hedgehog highway.

• Cut gaps at ground level, not raised up where a hedgehog cannot reach.
• Keep the gap clear of leaves, twigs and overgrown grass.
• If you have a pond, add a gentle ramp or a shallow pebble beach so hedgehogs can climb out.
• Check any gaps after storms or heavy rain—they can become blocked with debris.

Leave a Wild Corner

Hedgehogs are not fans of manicured order. A patch of long grass, a pile of logs, or a leaf heap provides shelter, nesting material and a home for the insects they eat. Leave a corner of the garden to go a little wild, and resist the urge to tidy every fallen leaf. Compost heaps are ideal—warm, damp and full of invertebrates—but take care when turning them, as a hedgehog may be resting inside.

• Create a log pile in a shady spot, with the logs left loose rather than cemented together.
• Leave a small area of uncut grass through winter, if you can.
• Grow native shrubs such as hawthorn, hazel or bramble for natural cover.
• Avoid using plastic netting near the ground, as hedgehogs can become entangled.

Food and Water Done Right

Hedgehogs do not need feeding to survive, but supplementary food can help in late autumn, during dry spells, or when a hedgehog is underweight. If you do feed, offer meat-based cat food (chicken or turkey, not fish), or a specialist hedgehog food. Put it in a shallow dish and remove any leftovers each morning to avoid attracting rats. Never give bread and milk—hedgehogs are lactose intolerant, and it can cause serious illness.

Water is just as important. A shallow dish of fresh water, no more than a few centimetres deep, gives hedgehogs a safe drink. Add a few small stones or a ramp so they can climb out if they fall in. Change the water daily, especially in summer, and keep the dish away from busy pathways where it might be knocked over.

Avoid Slug Pellets and Other Hazards

Slug pellets are one of the worst things you can leave in a hedgehog-friendly garden. Even if a hedgehog does not eat the pellets directly, it may eat a poisoned slug and suffer the consequences. Avoid slug pellets entirely, and use barriers, beer traps or hand-picking instead. Other hazards include strimmers, which can injure hedgehogs in long grass; garden netting, which can trap them; and uncovered drains or steep-sided ponds.

If you must use a strimmer, check the area first and cut from the top down. Keep netting well above ground level, and cover drains with a grille. If you find an injured hedgehog, place it in a secure box with a towel and seek advice from a local wildlife rescue—do not try to treat it yourself.

Check Bonfires and Think Year-Round

Bonfires are a particular danger. A pile of wood and leaves is exactly the kind of dry, sheltered spot a hedgehog will choose for a nest. Always check a bonfire before lighting it. Move the whole pile to a new spot, or rebuild it on the day you plan to burn. If you find a hedgehog, wear gloves and move it, along with plenty of nesting material, to a safe place well away from the fire.

Through the year, a hedgehog-friendly garden needs little more than consistency. Leave wild corners undisturbed in winter, keep water available in hot spells, and avoid chemicals. In return, you may be rewarded with the quiet pleasure of knowing that a small, spiny neighbour is thriving because of the choices you made. And that, for any gardener, is a fine thing indeed.