How to Get Rid of Ants on Plants?
Ants on your plants almost always signal the presence of aphids or scale insects: ants "farm" these pests to harvest their sweet honeydew. To get rid of them: eliminate the aphids first, put down a diatomaceous earth barrier, use a natural ant killer and cut off the bridges (leaves touching the ground). Treating the cause (the aphids) is the key.
A column of ants climbing up a stem? It is no coincidence. Understanding why they are there is half the solution. Here is the method.
Why are there ants on my plants?
Ants do not eat your plants: they come for the honeydew, the sugary substance excreted by aphids, scale insects and whiteflies. Where there are ants, there is therefore almost always a colony of sap-sucking pests nearby.
The ant-aphid connection
Ants actively protect aphids from their predators (such as ladybirds) so they can keep "milking" their honeydew. The result: as long as the ants are there, the aphid colony multiplies. That is why you need to treat both.
How do you get rid of them naturally? (steps)
- Eliminate the aphids / scale insects — the source of the problem (see our aphid guide).
- Put down a barrier of diatomaceous earth around the base of the plant and on the potting mix.
- Use a natural ant killer to treat the colony.
- Cut off the bridges: move away any leaves touching the ground or the walls.
Effective natural solutions
- Diatomaceous earth — a mineral barrier that stops ants in their tracks.
- Natural ant killer — to act on the colony at the source.
- Scent repellents (coffee grounds, citrus) — as a supplement along their routes.
- Aphid treatment — no honeydew, no more ants.
How do you prevent them from coming back?
- Monitor for aphids and treat them as soon as they appear.
- Avoid standing water in saucers.
- Keep the foliage away from walls and the ground.
- Inspect new plants before bringing them indoors.
FAQ: ants on plants
Are ants dangerous for plants?
Not directly, but they protect and spread aphids and scale insects, which makes the infestation worse. They can also dig into the potting mix of pots.
How do you keep ants away without chemicals?
By eliminating the aphids (their food source), with a diatomaceous earth barrier and a natural ant killer.
Why are there ants in the potting mix of my pot?
Often because it is too dry and they are building a nest there: a good soaking of the pot encourages them to leave.
- Natural ant killer — fast, lasting action.
- Diatomaceous earth 50 g — mineral barrier.
- Anti-aphid spray — removes the source of the honeydew.
Thriving, healthy plants, 100% natural, made in Ardèche. 🌿