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Thrips on houseplants: how to identify them and get rid of them
Small silvery, ochre or black spots appearing on the leaves of your houseplant? Some leaves look dull, damaged, almost discoloured in places? You can spot tiny elongated insects moving discreetly under the leaves?
It could well be thrips.
The good news: a thrips infestation can often be brought under control if you catch it early, with a regular method and a suitable treatment.
In short: what to do about thrips?
These small parasitic insects are common on houseplants and indoor greenery. They can be hard to spot at first, but can quickly weaken affected plants if left untreated. For both amateur gardeners and plant enthusiasts, the key is to act early, before the pest attack settles in for good.
If you think you've spotted thrips on your plant, here are the first steps to take:
- Isolate the affected plant immediately to prevent it from spreading to your other plants.
- Inspect the top and underside of the leaves, especially near the veins.
- Remove the most damaged leaves if the infestation is significant.
- Shower the foliage with lukewarm water, focusing on the underside of the leaves.
- Clean the leaves with a gentle black soap solution.
- Apply a suitable natural treatment, such as Super Neem Oil, making sure to cover the foliage and the surface of the soil.
- Repeat the treatment regularly, as eggs and larvae can survive the first round.
- Keep an eye on the plant for several weeks, even when the insects appear to be gone.
Thrips often call for patience. A single treatment isn't always enough. The aim is to gradually interrupt their reproductive cycle.
Table of contents
- How to recognise thrips on a houseplant ?
- The signs of a thrips attack
- Why do thrips appear on houseplants ?
- The houseplants most prone to thrips
- How to treat plants infested with thrips?
- How to prevent thrips from coming back?
- Our Plant Doctor tip
- Frequently asked questions about thrips
- The simple gesture to protect your plants
How to recognise thrips on a houseplant ?
Thrips are very small, elongated insects, often hard to see with the naked eye. They can be yellow, light beige, brown or black depending on their stage of development. They are sometimes compared to tiny grains of rice, very slim, that move slowly across the leaves.
Thrips mainly hide:
- under the leaves;
- along the veins;
- in young shoots;
- in leaves that are still curled;
- sometimes close to the substrate.
In most cases, you'll notice the damage before you see the insects themselves. Some species of thrips are particularly discreet and can go unnoticed for several days. They choose their host plants to feed, reproduce and sometimes lay their eggs directly inside the plant tissue. That's why the first visible signs often appear on the leaves before you can clearly make out the insect itself.
The signs of a thrips attack
On some plants, the damage is very visible. Leaves can look as if they've been "scraped" or drained of their colour in places.
Thrips feed by piercing plant tissue to suck out the sap. It's this action that creates the pale, silvery or irregular marks on the foliage.
The further the pest attack progresses, the more visible the marks become. A plant infested with thrips can show several symptoms:
- silvery spots or discoloured patches on the leaves;
- small ochre spots or light brown marks;
- black dots, which can correspond to insect droppings;
- leaves that turn dull or mottled, dry in places;
- deformed young shoots;
- leaves that partly dry out;
- a plant that seems to be losing its vigour.
Why do thrips appear on houseplants ?
Thrips can arrive in several ways:
- with a new plant brought into the home;
- via a plant placed near an open window;
- via a bouquet of cut flowers;
- via already contaminated soil or environment;
- when several plants are placed very close to each other.
They often enjoy warm, dry environments. A plant weakened by a lack of humidity, watering stress, low light or a build-up of dust on the leaves can also become more vulnerable.
This doesn't mean you've cared for your plant badly. Pests are part of plant life, especially indoors, where natural balances are more fragile than outside.
Like many pests, thrips look for favourable host plants: tender foliage, young shoots, a weakened plant, or a warm, dry environment. A plant stressed by air that's too dry or irregular watering can become more sensitive to a pest attack.
The houseplants most prone to thrips
Thrips can affect many houseplants, but some seem more exposed, particularly plants with tender, fine or decorative foliage.
You'll often find them on:
- Monstera;
- Calathea;
- Maranta;
- Ficus;
- Dracaena;
- Anthurium;
- Alocasia;
- Philodendron;
- indoor palms.
Plants with large leaves can sometimes be easier to inspect, but thrips can also hide in narrow leaves, new shoots or dense foliage.
How to treat plants infested with thrips?
To treat thrips, we recommend a gradual, natural and consistent approach.
The aim isn't simply to clean the leaves once, but to build a treatment routine regular enough to interrupt the thrips' life cycle.
Step 1: isolate the plant
Even if the infestation seems mild, isolate the affected plant. Thrips can move from one plant to another, especially when the foliage is touching or close.
Keep the plant in quarantine for at least 3 to 4 weeks.
Step 2: clean the foliage
Give the plant a lukewarm shower or clean the leaves one by one with a damp cloth.
For large leaves, like those of Monstera or Ficus, you can gently wipe the top and underside of the leaves.
For plants with finer foliage, opt for a gentle shower with black soap, without excessive pressure.
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Step 3: apply the Super Neem Oil treatment
Black soap helps to clean the foliage and remove some of the insects present. Super Neem Oil then takes over as a natural treatment and protective care product, to be repeated over time.
This is the key step: thrips are discreet, hide under the leaves and can come back if the treatment isn't repeated. Super Neem Oil makes it easy to slot a simple action into a regular care routine, both as prevention and as treatment.
Super Neem Oil is a natural care product formulated to help protect houseplants against common pests. It can be used both as prevention and treatment, in particular when the plant shows signs of infestation.
Its value against thrips is twofold:
- it helps to clean and protect the foliage;
- it allows you to set up a regular care routine to limit pests coming back.
Apply the product across the whole of the foliage, taking care to cover the underside of the leaves, the veins and the young shoots.
Avoid applying treatment to a plant in direct sunlight. Choose to apply it in the morning or at the end of the day, when the light is softer.
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Step 4: repeat the treatment
Thrips don't always disappear after a single application.
Some species can lay eggs inside the plant tissue or hide in hard-to-reach areas, such as the underside of the leaves, the young shoots or the surface of the soil. Eggs or larvae can remain present and restart the infestation a few days later.
Repeat the treatment regularly over several weeks, while observing how the plant evolves.
In the event of a visible infestation, a weekly application over 3 to 4 weeks may be needed. After that, you can move to a more spaced-out maintenance frequency, as prevention.
How to prevent thrips from coming back?
Once the infestation is under control, prevention becomes essential.
Here are the good habits to adopt:
- inspect the underside of the leaves regularly;
- clean the dust off the foliage;
- avoid placing plants right up against each other;
- keep any new plant under observation for a few days;
- maintain good ambient humidity based on the plant's needs;
- avoid repeated watering stress;
- use a natural preventive care product like Super Neem Oil.
Thrips are easier to control when they are spotted early. A simple weekly check can make a big difference.
Our Plant Doctor tip
When facing thrips, the most important thing is not to wait.
A small infestation can be treated relatively simply. But the more time the thrips have to settle in, the longer the treatment becomes.
Observe, isolate, clean, treat, then start over. It's this consistency that allows the plant to recover.
And above all, don't get discouraged if the first results aren't immediate. Plants move at their own pace. With the right care, they can often regain healthy foliage and beautiful vigour.
Frequently asked questions about thrips
How do I know if my plant has thrips?
The most common signs are silvery, ochre or black spots on the leaves, dull foliage, damaged young shoots and tiny elongated insects visible under the leaves. Always inspect the underside of the leaves, as thrips often hide there.
How do I get rid of thrips naturally?
Isolate the plant, shower the foliage, remove the most affected leaves, then apply a natural treatment such as Super Neem Oil. Repeat the process regularly over several weeks to reduce the risk of them coming back.
Is neem oil effective against thrips?
Neem oil is commonly used in natural plant care routines to help fight pests. Super Neem Oil can be used both as prevention and treatment, including against thrips, as long as it's applied regularly and across the whole of the foliage.
How often should I use Super Neem Oil against thrips?
If thrips are visible, apply [Super Neem Oil ](/accessories/super-neem-oil-entretien-plantes) once a week for 3 to 4 weeks. Keep inspecting the plant between each application, especially the underside of the leaves and the young shoots. Once the infestation appears to be under control, you can space out the applications and use Super Neem Oil as prevention, in particular on sensitive or recently arrived plants.
How long does it take to eliminate thrips?
It often takes several weeks. Even if the adults disappear quickly, eggs or larvae may still be present. That's why it's important to repeat the treatment and keep watching the plant for at least a month.
Do thrips live in the soil?
Thrips are mostly found on the foliage, but some stages of their cycle can take place close to the substrate. In case of a major or persistent infestation, repotting can be considered to start from a healthier base.
Should I change the soil if there are thrips?
Not always. If the infestation is mild and limited to the leaves, you don't necessarily need to repot the plant. Thorough cleaning of the foliage, quarantine and regular treatment can be enough. However, if the infestation is significant, long-standing, or if the plant seems to keep declining despite care, repotting can be helpful. In that case: gently remove the plant from its pot; remove as much old soil as possible without damaging the roots; rinse the roots if needed; clean the pot; use fresh, suitable soil; gradually resume your care routine. Let the plant recover in a bright spot, out of harsh direct sunlight, then continue monitoring.
Should I treat all the surrounding plants?
It's recommended to inspect every plant near the infested one. If they show suspicious signs, isolate and treat them too. If they show no symptoms, increased monitoring and a preventive routine can be enough.
Are thrips dangerous for houseplants?
Yes. Thrips feed on the plant's sap and can lastingly damage the foliage. A mild infestation isn't necessarily serious if treated quickly, but an advanced invasion can weaken the plant and slow its growth.
Should I throw away a plant infested with thrips?
Not necessarily. A plant that's only slightly affected can often bounce back with the right treatment and a bit of patience. On the other hand, if the plant is heavily infested, very weakened, or risks contaminating your whole collection, it may be better to let it go. It's a difficult decision, but sometimes a necessary one to protect the other plants. Before reaching that point, try a full routine first: isolation, cleaning, pruning damaged leaves, natural treatment and regular monitoring.
Can thrips be prevented?
Yes. Inspect your plants regularly, clean the leaves, avoid placing plants too close together, watch new plants when they arrive and use a natural preventive care product such as Super Neem Oil on sensitive plants.
How can I prevent another pest attack on my houseplants?
Inspect the underside of the leaves regularly, dust the foliage and avoid placing your plants right up against each other. A preventive routine with Super Neem Oil can also help to protect sensitive houseplants and limit the risk of another pest attack.
The simple gesture to protect your plants
A few minutes of observation, clean foliage, then a natural care product applied regularly: this is often all it takes to prevent a small infestation from turning into a real problem.
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