No. And this page exists to say so properly, because there is a whole industry built on selling treatments for a problem that is not one.
Almost never. Ants in a lawn, a border or under a patio slab are a normal part of a garden. They aerate soil, predate other insects, and cause no structural harm.
We do not offer garden ant treatment, and would decline the work if asked. The only thing worth acting on is a route into the building.
There is no version of garden ant control that makes sense. Remove one colony and the surrounding area supplies another within a season. Treat a lawn and you have spread a product across a space where children, pets and wildlife spend time, for no benefit.
A garden without ants is not an improvement on a garden with them. It is a garden that has been treated for something that was not wrong.
We publish prices for eleven services. Garden ant control is not one of them, deliberately.
They are a functioning part of a garden rather than an infestation of one.
See our complete service, published prices and treatment information.
View Ant Control Harrow →Cosmetic. If the mounds bother you when mowing, brush them level on a dry day and the ants will rebuild lower for a while. Repeated brushing sometimes encourages a colony to relocate. Neither requires a pest controller.
Extremely common — the warm sheltered ground under a slab is ideal nesting habitat. Over years they can bring fine soil up between slabs and contribute to one settling slightly. That is a maintenance issue for a paving contractor, not a pest problem.
Worth understanding, because the ants are a symptom. Ants farm aphids for honeydew, so ants swarming a rose or a bean plant usually means you have aphids. Dealing with the aphids removes the reason the ants are there.
Usually harmless. If a nest is disturbing seedling roots, watering thoroughly and regularly often encourages the colony to move without any treatment.
A mating flight, over a few days in warm weather, happening across the whole area at once. Startling, brief, and entirely normal.
One situation changes the answer, and it is the only one:
Then the problem is not the garden nest. It is the route indoors — and treatment is aimed at the colony producing the indoor activity, with the entry point sealed alongside.
Read nextAnt Trails Coming Into the House in Harrow – What Can You Do? →Every one of those is cheaper than a treatment and more durable than one.
Nearly everything in a British garden is the common black garden ant, which is what this page is about. Two occasional exceptions worth knowing:
Only if there is a route and a reason. Sealing the gaps deals with the first; not leaving food out deals with the second.
No. And it will not stop ants crossing from surrounding land in any case.
Seal the wall junction. That converts it from a potential problem into a garden nest like any other.
Something in the garden that genuinely does need dealing with — wasp nest treatment across Harrow is £90 fixed cost, guaranteed.
Almost never. They are a normal, beneficial part of a garden and we do not offer garden ant treatment.
Aerate soil, predate other insects, feed birds such as green woodpeckers, and disperse seeds.
Cosmetic. Brush them level on a dry day if they bother you when mowing.
Over years they can bring soil up between slabs. That is a paving maintenance issue rather than a pest problem.
They are farming aphids for honeydew. Deal with the aphids and the ants lose their reason to be there.
No. It is a mating flight lasting a few days, happening across the whole area at once.
Only when there is a persistent trail into the building that returns after you have cleaned it and removed the food.
Smaller, reddish, and capable of stinging. Still not usually a reason to treat a garden, though worth avoiding a nest near where children play.
Tell us what is happening indoors. If it is genuinely a garden nest and nothing more, we will tell you to leave it alone.
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