Why solitary bees need a helping hand

When most people picture a bee, they imagine a honeybee hive buzzing with thousands of workers. Yet the vast majority of the UK’s roughly 270 bee species are solitary. They do not live in colonies, make honey, or have a queen. Instead, each female builds her own nest, lays her eggs, and leaves the next generation to fend for itself. These unsung pollinators are vital for gardens, orchards, and wildflowers, often working harder and earlier in the year than their honeybee cousins.

In a tidy woodland garden, though, the nesting spots solitary bees need are in short supply. Fallen dead wood gets cleared, hollow plant stems get strimmed, and bare earth gets mulched. A bee hotel is a simple, satisfying way to put some of that back. It mimics the hollow stems and beetle holes that bees would naturally seek out, using materials you may already have lying around. Red mason bees, leafcutter bees, and a host of smaller species will happily move in if you get the details right.

Choosing the right location for your bee hotel

Solitary bees are cold-blooded, so warmth is everything. Fix your hotel to a south or east-facing wall, fence, or sturdy post that catches the morning sun. A spot that bakes all afternoon can become too hot, especially in a glasshouse or against a dark brick wall. Shelter from strong winds and driving rain is equally important. In a woodland garden, look for a clearing or the sunny edge of a tree canopy rather than deep shade.

Height matters, too. Aim for at least a metre off the ground, ideally between 1.5 and 2 metres. This keeps the nesting tubes out of reach of damp soil and most ground predators, whilst still making it easy for you to inspect and maintain. Avoid placing it directly above a bird table or near dense shrubs where tits and woodpeckers might lurk. A roof overhang of at least 5 centimetres will keep the rain off. Finally, fix the frame firmly. A wobbly hotel will not attract discerning bees.

Gathering recycled materials and tools

You do not need to buy anything new. The best bee hotels are made from scavenged timber, garden prunings, and old bamboo canes. Here is what to collect:

• Wooden frame: untreated timber such as old pallet wood, fence boards, or offcuts. Avoid tanalised or painted wood, which can contain chemicals. You want pieces roughly 30 centimetres wide, 30 centimetres high, and 15 to 20 centimetres deep, plus a back board and a roof with an overhang.
• Hollow stems: bamboo canes from spent plant supports, elder, bramble, hydrangea, or teasel. Cut them into lengths that match the depth of your frame, about 15 centimetres. Bamboo is ideal because it is tough and comes in many diameters.
• Drilled wood: a block of hardwood such as oak, ash, or beech, or a section of untreated log. Drill holes from 2 to 10 millimetres in diameter, about 10 centimetres deep, spaced 15 to 20 millimetres apart.
• Tools: a saw, drill with bits, secateurs, sandpaper, and a screwdriver or hammer. A wire bottle brush is useful later for cleaning.

Step-by-step construction

Start by building a simple open-fronted box. Cut two side pieces, a top, a bottom, and a back board from your recycled timber. Screw or nail them together, leaving the front open. Add a roof that overhangs the sides and front by at least 5 centimetres, angled slightly downwards so rain runs off. Drill a few small drainage holes in the bottom if you like, though a good roof usually keeps things dry enough.

Now fill the box tightly with nesting tubes. There should be no gaps between them, as gaps attract parasites and let in damp. Pack the hollow stems vertically or horizontally—solitary bees are not fussy, but horizontal tubes are slightly easier to inspect. For bamboo, cut just after a node so one end is naturally closed. If you only have open-ended stems, plug one end with a dab of mud or a small piece of cloth. Place the drilled wood block at the front or side, with the holes facing out. Smooth any rough entrances with sandpaper so bees do not tear their delicate wings.

Finally, mount your hotel in its chosen spot. Wedge it firmly against the wall or post, and check that it does not wobble. You are now ready for tenants.

Caring for your bee hotel through the year

Once bees move in, leave the hotel alone. You will see mud plugs in spring and summer, and neat circles of chewed leaves in early summer. These are signs that mason bees and leafcutter bees are nesting. Do not open the tubes or move the frame whilst bees are active, usually from March to August. In autumn, after the adults have emerged, you can clean the frame gently.

Replace hollow stems every two years to prevent the build-up of mites, mould, and parasites. Drilled wood blocks can be scrubbed with a dry bottle brush, but if holes become clogged or damaged, make a fresh block. Store old tubes in a cool, dry shed over winter, then compost them in spring. Never bring the hotel indoors, as warmth will confuse the bees’ natural timing.

Building a bee hotel from recycled materials is a small act with a big impact. It costs almost nothing, takes an afternoon, and gives a host of gentle, hard-working pollinators a safe place to raise their young. In return, your woodland garden will be richer for their presence—more fruit, more flowers, and a quiet hum of life from spring onwards.