The Reality Behind the Trend
Bee hotels — the bundled wooden structures with tubes and holes marketed as habitat for native bees — are everywhere. Many do attract nesting bees. Many others are poorly designed, become disease and parasite reservoirs, and do more harm than good. Understanding what separates an effective bee hotel from a decorative hazard is essential before installing one.
Which Bees Use Hotels?
Only cavity-nesting bees use bee hotels. This is approximately 30% of native bee species — mason bees, leafcutter bees, and some small sweat bees. Ground-nesting bees (the other 70%) are not helped at all by hotels. Honeybees and bumblebees do not use them either. A bee hotel specifically supports mason bees and leafcutter bees, which are excellent pollinators for fruit trees, vegetables, and flowering plants.
What a Good Bee Hotel Looks Like
Tube Diameter
Different bee species use different tube diameters. Mason bees prefer 5-8mm. Leafcutter bees prefer 6-8mm. A mix of sizes from 4-10mm accommodates the most species. Avoid tubes under 4mm — these are too small for most native bees and primarily collect mites.
Tube Depth
Tubes should be 4-6 inches deep. Shallow tubes (under 3 inches) result in all females (which are more valuable pollinators) being pushed to the back while males occupy the front. Female mason bees die off leaving males — the colony collapses.
Material
Paper tubes and bamboo are preferred over drilled wood blocks. Drilled wood blocks crack over time and cannot be replaced or cleaned. Paper tubes can be removed, the cocoons harvested and cleaned, and tubes replaced. Bamboo is intermediate — it cannot be split for cleaning but lasts longer than paper.
Placement
Face the hotel east or southeast to catch morning sun — this warms the nesting tubes and activates bees early in the day. Mount at eye level (4-6 feet from the ground). Protect from rain — overhanging eaves or a roofed structure prevents waterlogging that causes mold and rot in tubes.
Annual Maintenance Is Non-Negotiable
A bee hotel that is not cleaned annually becomes a disease and parasite reservoir. Pollen mites, parasitic wasps, and fungal pathogens accumulate in tubes and reduce bee survival year over year. Each fall: remove paper tubes, harvest cocoons, wash cocoons in a 1% bleach solution to remove parasites, allow to dry, and store in a cool place until spring.
Frequently Asked Questions
Why are no bees using my bee hotel?
Most common reasons: wrong tube diameter, insufficient depth, no nearby flowering plants, hotel facing the wrong direction (needs morning sun), or hotel installed too late in the season (mason bee season is primarily spring). Relocating, adjusting tube sizes, and adding native plants nearby usually solves it.
Do I need to buy a bee hotel or can I make one?
Making your own with the right specifications works well and is much cheaper. Bundles of paper tubes, bamboo sections, or drilled elder wood (elder has soft pith that bees excavate naturally) all work. The key is correct tube diameter, depth, and weather protection.
Are bee hotels safe to have around children?
Yes. Mason bees and leafcutter bees are solitary (no colony to defend) and extremely docile. They have a stinger but almost never sting unless directly handled. They are among the safest bees to have in a family garden.
Can I just leave the hotel up year-round without cleaning?
You can, but the hotel will become progressively less effective and potentially harmful to bees as disease and parasite loads build up. Annual cleaning is the difference between a habitat that supports a growing population and one that slowly poisons it.
How close to flowers should a bee hotel be?
Mason bees forage within 100-300 feet of their nest. The hotel should be within this range of abundant flowering plants — ideally visible from the hotel entrance. Placing a hotel far from flowers means bees travel further for food, reducing nesting success.