Most gardeners are missing the one pollinator that actually works their backyard — and they have no idea.
“Most gardeners are missing the one pollinator that actually works their backyard — and they have no idea.”
Why a 74-year-old Adelaide Hills cabinetmaker is releasing his last 68 bee hotels at a special price, before the shed closes for good.
Keith Pethick in the apple blocks below his shed at Lenswood, South Australia. The bees that do the work in a backyard like this one are almost never the bees people picture.
Last spring, in a backyard on the outskirts of Adelaide, a gardener pulled out three seasons of failing strawberries and started again with raised beds. The soil was tested. The pH was right. The aspect was right. The watering was textbook. The plants looked magnificent. They produced almost nothing.
Healthy plants. Empty hands. The same pattern turns up in Australian backyards every spring.
It is one of the odder patterns in Australian home gardening, and it has held for at least two decades: more knowledge, better tools, more expensive seedlings — and harvests that keep disappointing.
The standard advice points at soil chemistry, light, water, feed, the wrong variety for the district. Most of the time it is none of those things.
It is a pollination problem. And almost no gardener in this country has been told the truth about it.
The pollinator no garden centre will sell you
A native resin bee entering a finished tunnel. The plugged cells beside her were provisioned with pollen collected from somewhere inside a hundred-metre radius.
For forty years, the public conversation about bees in Australia has been about one species: the European honey bee. The hives. The honey. Save the bees.
The honey bee is not native to this country. It arrived in 1822, on a ship, as livestock. And for the vast majority of home gardens, it is not the species doing the work. It never was.
The plants in a typical Australian backyard — tomatoes, chillies, eggplant, blueberries, apples, stone fruit, pumpkin, zucchini — are worked hardest by native solitary bees. Resin bees. Leafcutter bees. Masked bees. Reed bees. Blue-banded bees. They look almost nothing like a honey bee, they do not live in a hive, they make no honey, and most gardeners have never knowingly seen one.
- Australia has roughly 1,700 described native bee species, and more than 99 per cent of them are solitary — no hive, no colony, no fallback.
- The blue-banded bee pollinates by vibration, striking the flower around 350 times a second to shake pollen loose. Tomatoes, eggplant, chillies and blueberries release pollen almost no other way. The honey bee physically cannot do it.
- A native solitary bee forages within roughly one hundred metres of her nest. A honey bee will travel several kilometres. Whose garden is getting pollinated — yours, or an orchard three suburbs away?
- Native bees carry pollen dry, loose, across the underside of the body, and drop it generously from flower to flower. A honey bee packs it wet and tight onto her legs, to take it home.
- Since varroa mite reached Australia in June 2022, more than 60 per cent of managed honey bee hives have been lost, leaving commercial growers roughly 300,000 hives short of what the pollination season needs.
- A solitary bee has no hive to defend. In forty-two years of working with them, the cabinetmaker in this story has logged zero stings.
For a commercial grower those numbers are not academic. Orchardists in the Adelaide Hills, the Riverland and the Goulburn Valley have spent the last four seasons finding out exactly what happens to a fruit set when managed hives get scarce.
For the home gardener, the same numbers are an open secret. The only question is how to bring the bees in.
What forty-two years at a workbench teach you about apples
The shed has not been rearranged since the eighties. “If a tool still does the job, you leave it where it is,” Keith says.
I drove up to Lenswood on a cold morning in early September, when the Hills were still more grey than green. Keith Pethick met me at the door of a thirty-eight square metre corrugated iron shed behind his house, in a faded blue work shirt with the sleeves pushed up past the elbow.
He is seventy-four. He has been drilling nesting bores by hand since 1984. Forty-two springs. He does not call himself a conservationist and never has. He calls himself a joiner who noticed something in a fence post and went and had a proper look at it.
On the bench at the back of the shed, under the window that faces down the hill, there is a stack of exercise books. Each page is a record of one hotel — where it went, which way it faces, and then, season by season, how many tunnels came back sealed and which bore sizes filled first.
One book, opened at 1997, is for a place at Forest Range, ten minutes up the road. The entry reads: Six sealed, first summer. Underneath, in the same pencil, one line per year, down the page and onto the next: Eleven. Nineteen. Full. Then the word full, written out again and again, for twenty-eight seasons.
Why almost every bee hotel sold in this country stays empty
For most Australian gardeners, the response to all of this is the same: right, I’ll buy a bee hotel.
And then nothing happens. The thing hangs on the fence for two summers, three summers, untouched. The gardener concludes that native bees must be scarce around here — or worse, that the whole pollinator story was overcooked to begin with.
It is almost never the bees. After pulling apart more failed hotels than he can count — from garden centres, from the big hardware chains, from online marketplaces — Keith found the same five faults over and over.
A typical imported hotel, three summers on a fence. Bamboo in random bores, cones, straw, a block of treated pine. Not one sealed tunnel.
Nearly every mass-produced bee hotel on an Australian shelf is imported, and imported timber goods are routinely fumigated on arrival as a biosecurity requirement. The residue is exactly the kind of chemical signal a nesting bee is built to avoid. “It’s been gassed before it ever gets to you,” Keith says. “She reads that from a long way off and keeps going.”
A bee’s wing is thinner than tissue paper. A single burr left inside a bore will catch a wing on the way out. “She can’t fly, so she can’t forage, so she dies in the hole,” Keith says. The next bee to inspect that hotel finds a body in the doorway and never goes in.
The cheap hotels are built from whatever is going, and in this country that usually means treated pine — timber impregnated under pressure with copper, chrome and arsenic to stop it rotting. It is a preservative designed to make wood inedible to insects. “Then they drill holes in it and sell it as a bee house. Think about that for a second.”
Most retail hotels run bores of seventy to eighty millimetres. Cavity-nesting natives want well past a hundred to lay female brood at the back where it is safe. In a short bore, parasitic wasps reach the cells from the entrance. “You’ve built a bait station for the wasps. The bees work that out in a fortnight.”
The big cottage-style insect hotels stuffed with cones and bark are designed to look charming on a shelf. No native bee nests in any of that. “The cones bring earwigs and slaters. The straw goes mouldy. The bark falls out. None of it is a nest. It’s a prop.”
I asked him how often, when someone writes to say their shop-bought hotel never worked, he can name the cause before they describe the unit.
“Nine times out of ten the thing never had a chance. They didn’t fail at attracting bees. They were built to fail.”
What it actually takes to bring native bees into a backyard
Keith walked me through the design he calls the Hollow Keeper — the version on his bench today being roughly the fortieth revision of the block he first wired to a redgum post in 1984. He does not describe it as a product. He describes it as “the answer to a problem I had myself.”
Six things matter, in his telling. Each one of them answers one of the faults above. Each one is the reason the hotel works as a pollination engine instead of a garden ornament.
A range of bore diameters, from about two and a half up to nine and a half millimetres, worked into a single face. Different natives need different sizes: masked bees take the smallest, resin and leafcutter bees the middle of the range. A single-size hotel draws one species at best. A spread of sizes means several species working the same garden in shifts, from first light to dusk, right through spring and into summer. The garden never gets a pollination gap.
Solid untreated cedar, nineteen millimetres thick on every face. No preservative, no sealant, no resin signature that a native bee reads as a warning. And the wall thickness behaves like a thermos: the brood sits at a stable temperature through a cold snap and through a run of thirty-five degree days. A thin pine box in full Australian sun cooks the brood in an afternoon.
Two thick cedar planks form the gable, and the ridge where they meet — the one seam every roof eventually fails at — is capped with a strip of hand-folded copper. It will not rust and it will not crack, and it darkens to a warm brown over a decade without ever needing replacing. More to the point, the planks overhang generously on all sides, so rain is thrown clear of the tunnel face and damp never reaches the cells. “The ridge is the difference between a hotel that lasts twenty years and one that’s gone in two.”
Every bore is drilled, then dressed by hand until the inside wall is smooth enough to catch the light. Then it is tested: Keith keeps a set of turned brass rods in a felt roll in the top drawer, one per bore size, and runs the matching rod through every tunnel before a hotel leaves the shed. If the rod catches, the bore goes back on the bench. This is the slowest step in the whole build, and the one his hands can no longer manage.
A solid cedar back panel, glued and pinned, closing every bore from behind. Most retail hotels are open at the rear — which means parasitic wasps lay straight into the brood from the back, and a whole season collapses without the gardener ever seeing why. A sealed back makes that impossible. “That’s why the one at Forest Range is still full after twenty-eight summers. Nothing can get in behind it.”
A heavy steel hook is mortised flush into the back panel. The hotel will hang off a fence post, screw flat to a wall, or stand against a north-facing structure. Whatever the backyard looks like, there is a correct mounting position within a few metres of where it is needed.
The copper ridge strip and the dressed notches along each board edge. Every one of them has had a brass rod run through it before the hotel left the shed.
The spring the blossom came and nothing came with it
Keith wired his first drilled block to a redgum post behind the shed in the spring of 1984. He did not expect much from it. He had noticed that the borer holes in the old posts along that fence line kept getting capped off with something that looked like resin, and he wanted to know what was doing it.
Thirty-five years later, on the morning of 20 December 2019, the Cudlee Creek fire came through the Adelaide Hills and burnt more than twenty thousand hectares. Dozens of orchards and vineyards went with it. Keith’s shed survived. The old bush block behind it did not.
And this is the part of the story he tells carefully, because it is the part everybody gets wrong.
“The fire didn’t kill the bees. It burnt their houses down. Everyone was looking at the trees. Nobody was looking at the holes in them.”
Forty years of standing dead timber, hollow stems, split posts and beetle-bored hardwood — the entire accommodation stock of every cavity-nesting native bee on that hillside — gone in an afternoon.
The following spring the apples flowered right across Lenswood. Keith stood in his own half-dozen trees and watched blossom open and drop, open and drop. The set that autumn was the worst he had seen in fifty years on that hill.
One of the first post-fire hotels, still on the shed wall. The timber has gone silver and the copper ridge has gone brown. Almost every tunnel is plugged.
So he stopped making furniture and started making nest boxes, and through the winter of 2020 he put them out across the burnt country — on his own fence line, on neighbours’ sheds, on posts in the orchard blocks below the house.
The first spring, a handful of tunnels came back sealed.
The second spring, most of the lower boards.
The third spring, he walked out one morning in late October to look at the trees, and the blossom was set so heavily that two of the branches he had pruned the previous autumn were bowing under the weight of it.
“That’s when I knew it was the housing all along. Those trees hadn’t carried like that since I was a young bloke.”
The third spring after the fire. The branch is carrying more blossom than Keith had pruned it to hold.
The exercise books on the bench now document the same shape in gardens from Bright to Bendigo to Kalamunda. Strawberry beds doubling. Tomatoes setting on trusses that used to drop. None of those gardens added a plant or changed a feed. They added a wooden box on a fence post.
The same beds, the same soil, the same gardener, two seasons apart. Nothing was added to the soil and nothing was replanted. The only change is on the post in the right-hand frame.
Why this is the last run
Four at once on the same face. The pale plugs are finished cells — provisioned, walled off, left to overwinter. The dark one is still being worked.
Keith can still dock timber. He can still measure. He can still cut the tunnel notches and he can still fold the copper for the ridge. All of that is within reach.
What he cannot do any more is the dressing. The pass with the file, the felt, the finish inside every single bore. That step needs hands that do not shake, and the arthritis in both thumb joints and both wrists has gone past the point where he trusts himself with it.
“The docking’s fine. The dressing isn’t. And if I can’t dress the bore, I won’t sell the box.”
His son is in Whyalla, his daughter is in Adelaide. His granddaughter Pip runs the small online side of it, but she does not work the bench. There is no apprentice. There has never been one.
What is in the shed right now is what is left. Sixty-eight finished hotels, plus the unfinished work on the bench — cedar boards and a roll of copper flashing that will become the last few of the run. When those go out, the shed closes. There is no second batch.
Why he refuses to put the price up
A Hollow Keeper on a post in a Hills native garden. Grevillea, kangaroo paw and bottlebrush either side — all inside the hundred-metre radius the bees will actually work.
By any sensible accounting a Hollow Keeper should cost two or three times what Keith asks for it. The labour — the folded copper ridge, the dressing, the brass rod through every tunnel — runs to roughly fourteen hours a unit. Comparable handwork out of a Japanese or northern European workshop sells well past A$200.
Keith has had every version of the conversation about raising the price: with his wife Marlene, with the family accountant, with two different retailers who wanted to stock him. He has said no every time.
“It was never about the money. I want them out there before the first hot week. Not on a shelf. Not in a box in someone’s garage. Out on a wall, facing the morning sun, with a bee looking at it.”
The price he insists on, even on the final run, is the price a working family can find for one garden upgrade. He says it is the only thing he was ever certain about: the hotel belongs in a backyard, pollinating, not in a cabinet.
What the gardens are doing now
“Same four strawberry beds for three seasons, same watering, and we were lucky to get a colander a week out of them. Put Keith’s hotel on the north-east fence at the end of August. By December we were giving punnets away at the school gate. Nothing else changed.”
“Two old apple trees out the back that had all but given up. I was about to take them out. Second summer with the hotel up, I picked more off the smaller one than I’d had off both in five years, and I had to prop a limb.”
“I’ve watched plenty of bee hotels die in their first winter — mould, parasites, splinters through the bores. This is the only one I’ve recommended to clients without a caveat. The build is closer to a piece of furniture than a garden product.”
What gardeners ask before they hang it
Disclosure: This article is a paid advertisement and contains promotional content. The Growing Season has a commercial relationship with the advertised product. The account of Keith Pethick and the Hollow Keeper is based on the maker’s own account; some narrative and quoted material has been arranged for editorial presentation. Product details, design specifications and garden results referenced here are those provided by the maker and by individual customers; results in any given garden will vary. This article is informational and is not professional horticultural, agricultural or scientific advice. Pricing and availability subject to change.