Do bee hotels attract wasps?

At a glance

• Social wasps (paper-nest builders) never use bee hotel tunnels.
• Some solitary wasps do use them, and are non-aggressive and beneficial.
• Tiny parasitic wasps target bee larvae inside cells — the genuine issue.
• Tunnels capped around 10mm favour bees over larger solitary wasp species.
• Cleaning old tunnels each year helps limit parasitic wasp build-up.

Three different insects share one name

Most confusion about wasps and bee hotels comes from three very different insects being lumped together under "wasp." Sorting them out first makes the rest of this straightforward.

Why social wasps are not the issue

The wasps most people are picturing when they ask this question build a papery, layered nest from chewed wood fibre and saliva, usually in a cavity like a loft, shed or hedge. That nest structure has nothing in common with a drilled or bundled tunnel, and a queen wasp founding a colony is not looking for anything a bee hotel offers. If you have ever had a wasp nest in a roof space, it did not come from, and will not move into, a bee hotel.

Solitary wasps: harmless, and arguably useful

Several solitary wasp species will nest in exactly the tunnel widths that also suit small bees, particularly in the 4–8mm range. Rather than pollen, females provision their cells with prey — aphids, small flies or spiders, depending on species — making them a genuinely useful predator to have in the garden. They behave much like the bees discussed in our tunnel diameter guide: non-aggressive, focused entirely on their own nest, and not remotely interested in people nearby.

Parasitic wasps: the one worth understanding

The wasps that actually matter for bee hotel health are ones you are unlikely to notice at all. Tiny parasitic species locate occupied cells and lay their own eggs inside, so their larvae consume the bee grub's food store or the grub itself. This is a normal part of any wild nesting system rather than evidence a hotel is faulty, but it is also the strongest reason to clean or replace tunnels periodically rather than leaving the same cells in continuous use for years — see our cleaning guide for how and when to do that.

What actually controls who moves in

Tunnel diameter does more work here than any other design choice. Diameters from 2mm to roughly 10mm sit squarely in the range solitary bees use, while noticeably larger holes are what tends to draw in bigger solitary wasp species looking for a cavity of their own. A hotel built with a capped, bee-appropriate size range is simply less attractive to the wasps people worry about, without needing any wasp-specific deterrent at all.

Common misconceptions worth clearing up

• "Any wasp near the hotel means a nest is forming." A single solitary wasp investigating one tunnel is not building a colony and will not attract more.
• "Wasps and bees compete for the same tunnels." In practice bees tend to occupy a hotel first if it is put out early and sized correctly; see when to put a hotel out for why timing helps.
• "A wasp in the hotel means it should be destroyed." Removing an occupied tunnel kills a beneficial predator for no real safety benefit.

What to look for when buying, if this is your concern

If avoiding solitary wasps as much as possible is a priority, look at the tunnel range before anything else — a hotel with holes capped around 10mm, like this one, favours bees over the wasp species that prefer wider cavities. The Wild Bee Hotel's tunnels run from 2mm to 10mm, hand-sanded and set into 19mm untreated Western red cedar with a solid rear panel. £39.99, free worldwide shipping and a 30-day money-back guarantee.