Attracting Hedgehogs to a Suburban Garden

Why Suburban Gardens Matter So Much

Hedgehog numbers in Britain have dropped dramatically over the past few decades, and the reasons are largely to do with how we manage the land around our homes. Intensified farming, tidy verges and sealed-up boundaries have left hedgehogs with fewer places to feed, nest and travel. The good news is that ordinary suburban gardens have quietly become some of the most valuable habitat we have left. The RSPB and wildlife charities estimate that Britain's gardens together cover a greater area than all our national nature reserves combined, and they're often linked by hedgerows, railway embankments and quiet back lanes.

The hedgehog you see snuffling across the lawn at dusk hasn't come from a distant wood. It's almost certainly living in your neighbourhood, moving between half a dozen gardens a night. That's why the most useful thing you can do isn't feeding it or building it a fancy house — it's making sure it can get in and out safely, and giving it somewhere undisturbed to sleep.

Cut a Gap, Build a Highway

A single enclosed garden, no matter how wildlife-friendly, is a trap rather than a habitat. Hedgehogs can walk surprisingly long distances — a couple of kilometres in a night is not unusual — but they can't climb a six-foot panel fence. The standard advice from hedgehog conservation groups is a 13cm by 13cm gap at ground level (roughly the size of a CD case stood on its edge). That's big enough for a hog, and far too small for most pets to squeeze through.

Where to cut your gap:

• The bottom corner of a fence panel, or a short section of gravel board lifted out entirely.
• A gap under a garden gate, or a rounded archway cut into a low brick wall.
• Under a hedge boundary — simply leave the bottom of the hedge unfilled rather than blocking it with timber or a wire skirt.

Do talk to your neighbours about it. One gap gets you nowhere on its own; a run of gaps along a terrace or around a close of houses creates a genuine route. It's also worth checking that any gap leads somewhere worth going — a link from a bare paved yard into a garden with borders and shrubs will get far more use than one between two lawns.

Leave One Corner Genuinely Wild

A wild corner is not an untidy corner, it's a working one. Hedgehogs need leaf litter for nesting material, dense cover for daytime sleeping and a supply of insects to eat. The ideal is a quiet patch at the back of the garden, away from the patio and the busiest path, where you let long grass, nettles, brambles or a mixed shrub border thicken up.

• Let fallen leaves accumulate under hedges and shrubs, rather than clearing them in autumn.
• Stack a few logs and prunings in a loose, undisturbed pile — a magnet for beetles, caterpillars and slugs.
• Leave one patch of lawn unmown through summer, mowing it in spring the following year.
• Skip the autumn tidy-up on the back border. Seed heads, collapsed stems and dead foliage all shelter invertebrates.

If you're worried about how it looks, frame it — a low log roll, a few spring bulbs at the front, or a hand-painted sign. A wild corner reads as deliberate as soon as it's edged neatly.

Water, Food and the Slug Pellet Problem

Hedgehogs need to drink every night, especially in dry spells and hot weather. A shallow dish 2–3cm deep set into the border or beside the wild corner is ideal — a large plant saucer sunk to ground level works beautifully, with a couple of pebbles added as escape routes if anything falls in. Hedgehogs are surprisingly poor swimmers for a creature that spends its life at ground level, and steep-sided containers are a real killer.

Never offer milk or bread. Hedgehogs are lactose intolerant and milk gives them diarrhoea, which is often fatal in a dehydrated animal. If you want to supplement what the garden provides, put out a small bowl of meat-based cat or dog food (the jelly kind, not fish or gravy), plus a dish of fresh water. Kitten biscuits are a reasonable dry option.

The single biggest dietary change you can make, though, is to stop using slug pellets. Metaldehyde and ferric phosphate pellets both poison hedgehogs — metaldehyde directly, and ferric phosphate indirectly by killing the slugs and leaving poisoned bodies for a hog to eat. A hedgehog will happily clear a surprising proportion of your slugs without any help. If you have a genuine slug problem, hand-pick after rain, encourage frogs and ground beetles, and accept some damage to your lettuces in exchange for a living garden.

Avoid the Quiet Hazards

Most suburban hedgehog deaths are preventable accidents, not disease. A short list to keep in mind:

• Bonfires. A pile of dry wood is exactly what a hedgehog looks for in October. Rebuild the bonfire on the day you light it, and check it thoroughly before a match goes anywhere near it.
• Strimmers. Check long grass before cutting, every single time. If you must strim a wild corner, do it after dusk in warm weather or leave it until spring.
• Ponds and water butts. A gently sloping edge, or a ramp of stones or chicken wire, lets a hedgehog climb out.
• Netting and wire. Fruit net, pea net and loose chicken wire tangle legs and spines. Keep netting 15cm off the ground, or don't use it.
• Drains and gullies. A raised cover, or a few pebbles at the bottom of any light well, gives an escape route.

Shelter and a Place to Hibernate

Once the route, water and food are sorted, shelter is the reward. A proper hedgehog house — a wooden box with an offset tunnel entrance and a floor — placed in the quiet corner against a hedge or wall, facing away from the prevailing wind, will often be used for daytime sleeping and for hibernation from around November to March. Fill it with dry leaves and leave it alone; don't lift the lid to check.

Hibernation doesn't want a heated space. It wants a dry, stable one at ground level, ideally under a dense hedge. Leaving your garden a little shaggier through autumn and winter is the most generous thing you can do — and the hedgehog you're helping this year will be the same one returning next spring, following the gaps you've left open.