Pigeons on winter brassicas: what allotment sites and growers can do

You net the sprouts in October and forget one row of kale. By January that row is stalks and leaf veins, and the rest of the bed is untouched. Wood pigeons work exactly like that. They find the gap, they come back, and they bring the flock with them.

The short answer is that netting is the only thing that reliably keeps them off brassicas, and every other method buys time around it. A green beam swept across the plot at first and last light is one of those extras, and it fits the problem because it lands in the low light window when pigeons arrive and leave. Run as a short daily round alongside netting, it stops birds settling into the parts of a site nobody can cover.

Why autumn turns pigeons onto your brassicas

Green crops become the best meal available once the stubble is ploughed in. The RSPB puts the UK breeding population at about 5.2 million pairs, and notes that winter numbers are boosted by birds arriving from the continent. So the population you dealt with in August is not the population that turns up in December.

Cold weather concentrates them. The RHS records flocks of up to 50 birds descending on allotments in winter, when frost or snow limits other food sources. That is why growers who saw nothing in October can lose plants in a single frosty week.

Where you garden matters too. The AHDB horticulture knowledge library reports that wood pigeon densities are highest in the eastern half of England, which is also where horticultural production is most concentrated. Eastern sites feel this first and hardest.

What the damage looks like

Pigeon damage is unmistakable once you have seen it. The RHS describes birds pecking at leaves and ripping off portions, often leaving just the stalks and the larger leaf veins, with brassicas and peas as the favourites. Slug damage leaves holes in intact leaves; pigeons leave a skeleton.

What the trials rank highest

Netting wins, and it is not close. In a Which? Gardening trial on spring cabbages published on 12 November 2025, 1% of netted plants showed significant damage, against 14% with a sonic scarer and 16% with a kite.

The RHS takes the same position: the only certain way of protecting vulnerable plants is to grow them under netting or in a fruit cage, and scaring devices give limited protection. Any honest answer to “what is the best pigeon deterrent for brassicas” starts with a physical barrier.

That leaves a problem for anyone with more ground than netting. Sprouts outgrow low hoops and a field of winter cabbage cannot be covered at all. Here is how the options compare for that ground.

Method	What the evidence shows	What it asks of you
Netting or fruit cage	1% of cabbages significantly damaged in the Which? trial; the RHS calls it the only certain protection	Materials, fitting, weekly checks for gaps
Sonic scarer	14% of cabbages significantly damaged in the same trial	Re-site often; carries to neighbours
Kite or hawk shape	16% of cabbages significantly damaged in the same trial	Move it between positions
Green laser round	No controlled trial on brassicas; wild bird visits down 98.2% in the poultry study, and 165,000 cabbage plants came through with only light damage (Farmers Weekly)	Two short rounds a day, in low light
Nothing	Flocks of up to 50 birds on a site (RHS); leaves stripped to stalks and veins	Replanting in spring

Where a green beam fits

A beam moves birds that have not yet committed to a landing, which makes it a patrol tool rather than a barrier. The strongest published number comes from a study by Elbers and Gonzales in Scientific Reports, where an automated 532 nm green laser cut wild bird visits to a free range poultry area by 98.2%, with a 95% confidence interval of 95.7 to 99.3.

Broken down by group, waterfowl visits fell 99.7% and passerines 96.1%. The comparison was 29 control days in December 2019 against 28 treatment days in January 2020, so this is a midwinter result.

Two honest caveats. That study counted wild birds around poultry, not wood pigeons on cabbages, so read it as evidence that a green beam displaces wild birds in low light rather than as a pigeon-specific figure. And the beam did its work while the birds were approaching or loafing; a bird already feeding in the middle of a bed takes longer to shift. More on how different species respond is in our guide to using a green laser as a bird scarer.

Timing: the window that does the work

Pigeons arrive and leave in low light, so that is when a round pays. The automated laser in the Scientific Reports study ran from 17:00 until 10:00 the next morning, covering dusk, the whole night and dawn. You are not going to do that by hand, but you can take the two ends of it.

Those ends move fast through autumn. Taking York as the example, and the mid month times from the sunrise-sunset.org API, sunset shifts from 19:23 on 15 September to 15:44 on 15 December, while sunrise slides from 06:36 to 08:14. Civil twilight adds about 35 minutes at each end in September and about 40 in December, so the workable window on 15 December runs from 07:33 to 08:14 and from 15:44 to 16:25.

From November to January the evening round therefore lands in the middle of the afternoon, not after tea. Put it in the diary as a time rather than as “before dark”.

The dawn and dusk round, step by step

A round is a walk with a purpose, not a light show. Ten minutes at each end of the day, following the same route, is what turns a plot into somewhere the flock skips.

1. Set the two times from the calendar. Start about forty minutes before sunrise in midwinter and go out again as the sun drops, adjusting every fortnight as the window shifts.
2. Walk the same route. Start at the boundary hedge or the trees where birds gather before they drop in, then work down the rows.
3. Sweep the ground ahead of the birds. Aim a few metres short of the nearest bird and move the spot towards it, across the ground rather than at the bird. A spot that is travelling is what they respond to.
4. Keep the beam moving. A dot that stops moving stops working, so sweep left to right and back rather than holding it on one plant.
5. Cover the perches, not just the beds. Sheds, fence posts and the boundary trees are where the flock waits and watches the plot.
6. Log what you see. Count birds on the site at the start of each round. A fortnight of counts tells you whether the routine is doing anything.

Keep it up daily through the cold spells. Pressure tracks the weather, so the fortnight either side of a hard frost is when the round earns its keep and when skipping two mornings costs you a row.

Bigger plots and shared sites

Scale changes the job from gardening to routine. On a North Yorkshire farm reported by Farmers Weekly in August 2015, 165,000 pointed cabbage plants went in during late July and were protected with a solar powered laser. Only light damage occurred on isolated plants, and no plant was lost completely to birds.

That is the model at field scale: a permanent beam covering the block through the low light hours rather than a person with a torch. On an allotment site the equivalent is a rota. One person walking a ten minute round covers the whole site better than every plotholder flapping at their own kale, because the flock reads the site as one place.

Two things make a rota work. Everyone nets what they can, so the beam is only holding the ground nobody can cover. And the round happens every day of a cold spell, because a gap puts the birds straight back on the site.

One more reason to stay with methods that simply move birds on: the wood pigeon is on the amber list in the UK, according to the RSPB. A beam and a net both leave the flock to find its food somewhere else, which is also what keeps a shared site on good terms with its neighbours.

Frequently asked questions

How do I stop pigeons eating my cabbages?

Net them. In the Which? Gardening trial, 1% of netted spring cabbages showed significant damage against 14% with a sonic scarer and 16% with a kite. Use netting or a fruit cage on everything you can cover, keep it clear of the leaves so birds cannot peck through, and use a scaring round only for the ground you cannot net.

What is the best pigeon deterrent for brassicas?

A physical barrier, with a daily scaring round behind it. The RHS states that the only certain way of protecting vulnerable plants is netting or a fruit cage, and that scaring devices give limited protection. A green beam at dawn and dusk is a sensible addition, because it works in the light conditions when pigeons move.

Do bird scarers actually work on pigeons?

Partly. Sonic scarers and kites both left far more damage than netting in the Which? trial, at 14% and 16% of plants against 1%. A device that sits in one spot never changes, which is the weakness of the fixed scarer. A round you walk yourself varies in position, timing and direction, and that is what holds a site through a cold spell.

How do you protect brassicas without netting?

Work the ground you cannot cover with a routine instead of a device. Walk a ten minute round at first and last light, sweep a green beam along the rows and across the perches where the flock waits, and keep it going through every cold spell. In the Which? trial the two fixed devices left 14% and 16% of plants damaged, so a scarer left standing on its own is not the answer.

Why are pigeons eating my sprouts in winter?

Because your sprouts are the only green thing left. The RHS notes that flocks of up to 50 birds descend on allotments when frost or snow limits other food, and the RSPB says winter numbers rise as birds arrive from the continent. Standing brassicas become the obvious target once the stubble and berries are gone.

Does a laser bird deterrent work on wood pigeons?

The evidence is promising rather than pigeon-specific. An automated green laser cut wild bird visits by 98.2% in the Scientific Reports poultry study, and a North Yorkshire cabbage crop of 165,000 plants came through with only light damage under a solar powered unit. Treat a beam as a supporting round alongside netting, not as a replacement.

Where to start this autumn

Net what you can cover before the first frost, because that is the step with the numbers behind it. Give whatever is left uncovered a ten minute round at first and last light through every cold spell, and count the birds each time so you can see whether it is working.

Beam colour matters as much as output for outdoor work, which we go into in which laser pointer colour to choose, and the rest of the range is in the shop. If you are running a whole site or a field rather than a single plot, send the layout and the distances through the contact page.

Tim Buikema runs Emax Laser Pointers, the UK shop of Emax Lasers. He has supplied laser pointers to farms, marinas and facility managers since 2011 and opened the UK shop in 2017.