How to Build a Bug Hotel

A bug hotel is one of the easiest and most rewarding wildlife projects for a UK garden. It gives solitary bees somewhere to nest, and ladybirds, lacewings, earwigs and beetles a cosy place for winter. Tidy modern gardens often lack the dead wood and hollow stems these bugs need, and a bug hotel puts them back in one neat box. You can build one in an afternoon for very little money.

It’s not just good for wildlife. Solitary bees are brilliant pollinators, and ladybirds and lacewings gobble up aphids. A bug hotel earns its keep in any garden, from a small urban plot to a big country garden.

Which insects use which materials?

Different bugs like different things, so the secret is variety. Pack in a mix and you’ll get the widest range of guests.

Bamboo canes and hollow stems

Solitary bees are the star guests. Red mason bees nest in tubes about 8mm wide and 15cm deep. They lay eggs in a row of little rooms, each with a ball of pollen and a mud wall. Leafcutter bees like slightly narrower tubes, about 6mm, and seal them with neat circles of leaf.

Cut bamboo canes to 15cm lengths with clean, unsplintered ends. Ideally each one is closed at one end by a natural joint. If both ends are open, push the bundle against a solid back board. Hollow stems from teasel and buddleia work well too.

Drilled hardwood logs

Drill holes 3-10mm wide and 10-15cm deep into untreated hardwood such as oak, ash, beech or birch. Avoid softwood, which can be sappy and splinter. Drill at a slight upward angle so rain runs out, and sand the entrances smooth so bees don’t tear their wings.

Hardwood like oak gives clean, splinter-free holes. Sand the entrances smooth so nesting bees don’t tear their delicate wings.

Pine cones

Ladybirds spend the winter tucked between pine cone scales. Pack cones tightly into one section. Ladybirds crawl in around October and come out in spring as the aphids appear.

Straw and dry grass bundles

Lacewings like to overwinter in dry, packed material. Roll straw or dry grass into tight bundles and stuff them into a section or a short piece of drainpipe. Lacewing larvae are hungry aphid eaters.

Bark, logs, and dead wood

Stack bark and short log offcuts loosely. Beetles, woodlice, centipedes and spiders will move in. They all help break things down and keep pests in check. Dead wood also feeds the fungi and creatures that help you make good compost.

Corrugated cardboard rolls

Roll corrugated cardboard into tight tubes and pack them in. Earwigs hide in the grooves. They eat aphids, mites and insect eggs, so despite their reputation they’re garden helpers.

Everything ready to go: bamboo canes, pine cones, bark, straw, drilled logs and bricks.

How to build a bug hotel step by step

A bug hotel can be anything from one tin can to a big freestanding tower. The rules are the same whatever the size.

Small bug hotel (tin can or single box)

Time: about 20 minutes.

1. Take a clean tin can or small wooden box at least 15cm deep
2. Cut bamboo canes to the same depth
3. Pack them in tightly so they can’t fall out
4. Fix it on its side to a sunny fence or wall, about 1 metre up
5. Tilt it very slightly down at the front so rain runs off

It’s a perfect first project for small gardens and balconies.

Medium bug hotel (pallet or crate)

Time: 2-3 hours.

1. Frame: Use a wooden crate, wine box or a pallet stood on its end. It needs a solid back, sides and a waterproof roof. An old roof tile or a bit of roofing felt does the job.
2. Sections: Split the inside into sections with timber offcuts, bricks or short planks. Each section gets a different filling.
3. Fill it:
   • Top: bamboo canes and drilled logs (bees like the warmest spot)
   • Middle: pine cones on one side, straw on the other
   • Bottom: bark, dead wood and log offcuts
4. Pack it tight. Loose canes blow out or get pulled out by birds.
5. Fix it firmly to a wall, fence or sturdy post, at least 1 metre up.

A finished bug hotel on a sunny stone wall, with wildflowers planted underneath.

Large freestanding bug hotel

For a real feature, build a frame from stacked pallets or chunky timber posts. Big hotels look great in cottage gardens. Make it 1-1.5 metres tall with a sloping roof to shed rain, and fill each level with something different. Make sure it can’t topple over: stake the base or fix it to a wall.

Positioning your bug hotel

Where you put it matters just as much as what goes in it. In the wrong spot, it will stay empty.

Direction and sunlight

Face it south or south-east. Solitary bees need the morning sun to warm up before they can fly. Hotels facing north stay cold and damp, and bees give them a miss.

Height

Fix it at least 1 metre off the ground, ideally 1-1.5 metres. That keeps it away from damp and out of easy reach of ground predators.

Shelter from wind and rain

Pick a sheltered spot, such as a wall, fence or hedge that blocks the wind. Make sure the roof sticks out at least 5cm over the front so rain stays off the tubes. Wet canes go mouldy, which kills the baby bees.

Near flowers

Put it close to flowers, ideally within 10-20 metres. The less far bees have to fly for food, the better. A border of bee-friendly plants nearby is perfect. Lavender, catmint and borage feed them through summer.

Stability

Fix it firmly so it can’t rock or swing, as bees won’t nest in a wobbly hotel. Screw it straight to a wall or fence, or use stakes or heavy stones for a freestanding one.

Gardener’s tip: Try not to fiddle with it. Knocks and vibrations put bees off. Once it’s up, leave it alone while bees are nesting. You can see the mud plugs in filled tubes without touching a thing.

Bug hotels and natural pest control

A busy bug hotel is like a little pest control station. The insects it attracts eat aphids, mites and more.

Pollination boost

Red mason bees are superb pollinators. They fly on cooler, cloudier days than honeybees, which suits the British weather. Fruit trees, runner beans, courgettes and strawberries all do better with mason bees nearby.

A solitary bee heading into a bamboo tube. Red mason bees seal filled tubes with a mud plug.

Aphid control

Ladybirds and lacewing larvae both eat lots of aphids, and earwigs clear aphids at night. With these helpers around, you’ll need to reach for sprays far less often.

The RHS guide to insect hotels has more ideas for bringing wildlife into the garden.

Year-round maintenance

Bug hotels need very little looking after, but a few jobs keep them healthy.

Spring (March to May)

Watch for action. Red mason bees come out in March and get nesting almost straight away. You’ll see females carrying mud to seal their tubes. Leave them to it, and keep plenty of flowers nearby.

Summer (June to August)

Leafcutter bees nest from June, sealing tubes with discs of leaf. Top up any straw or bark that has sunk or blown away, and check the roof is still watertight.

Autumn (September to November)

Ladybirds and lacewings arrive looking for a winter bed. Check the pine cones and straw are dry and well packed. Clear cobwebs that block the bee tubes. Spiders are welcome guests, but they sometimes get in the way.

Winter (December to February)

Leave the hotel completely alone. Young bees are growing inside the sealed tubes, and ladybirds and lacewings are asleep. Don’t move or clean it.

Replacing materials

Swap old tubes for fresh ones every couple of years. Old tubes can build up tiny parasitic wasps and mites that attack bee larvae. Only remove tubes that are empty, with no mud or leaf plugs. Sealed tubes still have bees inside, so never throw them away or burn them. Get rid of empty old tubes away from the garden.

Common mistakes to avoid

Using softwood for drilled logs

Pine and other softwoods can be sappy and splintery. Stick to untreated hardwood such as oak, ash, beech, birch or fruit wood, with no paint, varnish or preservative.

Drilling holes too shallow

Bees mostly ignore holes shorter than 10cm. Female bees lay eggs that will become females at the back of the tube and males near the front, so short tubes give you mostly males. Aim for about 15cm.

Placing in shade

A shady or north-facing hotel stays cold and damp. Bees won’t nest there, and damp canes go mouldy. Always choose a sunny spot facing south.

Leaving materials for years

Tubes left for years become a hideout for the tiny wasps that attack bee larvae. Swap empty tubes every couple of years to keep things healthy.

Making it too exposed

A hotel with no roof overhang fills with rain. Straw rots, canes go mouldy and sleeping insects can drown. Give it a waterproof roof that overhangs by at least 5cm. An old tile, slate or bit of marine plywood is perfect.

Size options for every garden

You don’t need a big garden. Even one bundle of bamboo on a balcony railing can attract nesting bees.

Balcony or windowsill

A tin can packed with bamboo canes, fixed on its side in a sunny spot. Takes 15 minutes, and red mason bees may move in come spring. Great for flats.

Even a balcony has room for a bug hotel. Muddy plugs in the cane ends mean red mason bees have moved in, so leave them be.

Small garden

A wooden crate or wine box with 3-4 sections, fixed to a sunny fence. That’s the medium build above. It fits neatly into a front garden or side passage.

Medium to large garden

A pallet hotel or freestanding tower with lots of levels and materials. It’s a garden feature in its own right.

Part of a wider wildlife garden

A bug hotel works best as part of a bigger picture. Team it with a wildflower lawn and a wildlife pond and your garden will be buzzing.

For more on helping bees nest in your garden, the Bumblebee Conservation Trust has friendly advice on nesting spots and planting for pollinators.

Frequently asked questions

What insects use a bug hotel?

Mostly solitary bees, ladybirds, lacewings and earwigs. Red mason bees use bamboo tubes and drilled holes in spring, and leafcutter bees move in over summer. Ladybirds snuggle into pine cones and lacewings into straw for the winter. Beetles and woodlice shelter in the bark and dead wood.

Where should I put a bug hotel?

Somewhere sunny, facing south or south-east. Fix it firmly at least 1 metre off the ground on a wall, fence or sturdy post. Pick a spot sheltered from the wind and close to flowers. Avoid deep shade, where it stays cold and damp.

When should I put up a bug hotel?

Late February or early March is ideal. Red mason bees come out from mid-March and start hunting for nest sites straight away. Autumn works too. The hotel weathers over winter, and ladybirds and lacewings may move in before spring.

Do bug hotels actually work?

Yes, and it’s easy to see when they do. Red mason bees seal each filled tube with a little mud plug, and leafcutter bees use neat discs of leaf. A sunny hotel near flowers often gets its first bees in its first spring.

How do I clean a bug hotel?

Swap old tubes for fresh ones every couple of years. Only take out tubes that are empty, with no mud or leaf plugs, as sealed tubes have young bees inside. Top up pine cones and straw as needed. Leave the hotel alone while bees are nesting.

What size holes do solitary bees need?

A mix of 3-10mm wide suits the most bees. Red mason bees like about 8mm, leafcutter bees about 6mm, and smaller bees 3-5mm. Make the holes about 15cm deep, as short tubes mostly produce male bees.