Why a bug hotel is worth the bother

Britain has around 250 species of solitary bee, and not one of them lives in a hive. Each female finds her own narrow tunnel — a hollow plant stem, a beetle bore-hole, a gap between loose bricks — lays her eggs, seals it up and flies off. Add beetles, lacewings, ladybirds, spiders and overwintering queen bumblebees, and you have a small army of garden allies looking for somewhere dry and snug to sit out the cold months.

A bug hotel is simply a tidy imitation of the messy habitats these creatures already use. It won't replace a wild corner, a hedgerow or a patch of long grass, but it does something those things can't always do in a small modern garden: it offers a stable, rain-sheltered microclimate right where you can keep an eye on it. Build one from things you already have lying about and you'll spend an afternoon's work on a structure that keeps giving for years.

Pick a sheltered, sunny spot first

Position matters more than the structure itself. Solitary bees need warmth to become active, so a south- or south-east-facing wall is ideal, catching sun for most of the day. Shelter it from the prevailing wind and from driving rain — beside a shed wall, under a hedge, or against a warm brick boundary works beautifully.

Raise the whole thing at least 20cm off the ground on a couple of bricks or a spare paving slab. Tucked down at soil level, it will wick up damp and rot your materials from underneath. Around a metre off the ground is the sweet spot: dry, out of reach of slugs, and easy to inspect.

One more thought — put it somewhere you actually sit. A bug hotel fixed to the wall beside a bench, or leaning against a summerhouse, turns a functional bit of garden kit into part of a cosy outdoor retreat. You'll notice far more when you're idling there with a mug of tea than when it's hidden behind the wheelie bins.

What to gather, and what to leave out

Most of this is already in your shed, your log basket or the back of the border.

• Old bricks with frog holes, and broken terracotta pot shards — the holes are ready-made bee tunnels.
• Untreated timber offcuts and logs, drilled with holes 2–10mm across and 8–10cm deep. Different diameters suit different species.
• Hollow stems: bamboo canes, teasel, hogweed or old raspberry canes, cut just below a node so one end is naturally sealed.
• Dry leaf litter, straw, wood shavings and loose bark for beetles and overwintering insects.
• A pallet or two as a frame, and a roof tile or slate for the lid.

Avoid anything treated, painted or varnished — the preservatives are toxic to the very creatures you're inviting in. Skip plastic bottles stuffed with straw, which sweat and grow mould. Never use open-ended cane bundles facing upwards; rain runs straight in and drowns the brood. And leave out glass, wire wool and staples.

Building it, layer by layer

Stack in bands, working from damp-loving to dry-loving. Start with a base of leaf litter, dead wood and bark, then build up with drilled logs and holey bricks. Finish with the hollow stems at the top, angled very slightly downwards towards the back, or capped at the front with a small offcut of timber so rain can't enter. Overhang a roof tile by a good 10cm on every side.

Keep the finished stack to roughly 60–80cm wide and about a metre tall. Bigger isn't better: a vast hollow tower stays cold, while a tightly packed, modest stack holds warmth. Firm everything so it doesn't wobble in the wind, and stretch a piece of wire mesh across the bee tubes — birds will otherwise pull the larvae out one by one.

Keeping it going through the year

Do almost nothing. From autumn to early spring, leave the whole structure undisturbed; it's full of sleeping insects and that is the entire point.

• In late spring, once the bees have emerged, pull out any spent or mouldy stems and replace them.
• Check the roof after winter gales and re-seat it if it has slipped.
• Top up the leaf litter in autumn and add a small log pile at the base for beetles and hedgehogs.
• Plant lavender, rosemary, comfrey or foxgloves nearby so emerging bees have food within a few metres.

Don't scrub it, don't spray near it, and don't tidy the surrounding border too hard. A few fallen leaves and spent seed heads are part of the appeal.

What you'll see

Leafcutter bees lining tunnels with neat discs of rose leaf. Red mason bees capping their tubes with mud. Small holes appearing in the drilled logs as beetles emerge. A ladybird tucked into a crevice, and lacewings sheltering in the straw over winter. Best of all, more pollinators working the flowers — the bug hotel guests pay for their lodgings in fruit, beans and tomatoes. It's a small, cheap, satisfying thing to build, and it makes your garden a better place to sit, for you and for everything else.