To get rid of thrips on houseplants, isolate the plant, wipe or rinse off as many as you can, then treat with neem oil or an insecticidal soap once a week for at least three to four weeks to break the breeding cycle. Thrips are stubborn because their eggs sit inside leaf tissue, so a single treatment never clears them.
Thrips on houseplants are tiny, slender insects, roughly 1 to 2 mm long, that rasp at leaves and suck the sap. The damage shows as silvery, stippled patches, pale streaks and distorted new growth, often with tiny black dots of frass. Here is how we clear them at the nursery.
Step One: Isolate and Inspect
Move the affected plant well away from the rest of your collection straight away. Thrips move between plants easily, and one untreated plant will reinfest everything around it. Check the undersides of leaves and the newest growth, where thrips gather, using a hand lens if you have one. While you are at it, inspect near neighbours too. If you want a refresher on spotting an infestation early, see our guide to what thrips damage looks like on houseplants.
Step Two: Knock the Numbers Down
Before you treat, physically remove as many thrips as possible. Wipe leaves with a damp cloth, or rinse the whole plant under a lukewarm shower or with a pump pressure sprayer, paying attention to leaf undersides. Prune off badly distorted or heavily damaged leaves and bin them, do not compost them indoors. Fewer adults at the start means the follow-up treatments have less to do.
Step Three: Treat with Neem or Insecticidal Soap
Our first choice is a natural treatment. Neem oil disrupts the thrips' feeding and development, while insecticidal soaps kill on contact. Mix according to the label, then coat the whole plant, especially the undersides of leaves and the growing points.
- Treat once every seven days, not once and done.
- Keep going for at least three to four weeks so you catch newly hatched thrips before they breed.
- Apply out of direct sun to avoid leaf scorch, and cover the top of the pot so runoff soaks the soil where some larvae pupate.
Consistency matters far more than strength here. The reason thrips come back is almost always that treatment stopped too soon, a point we cover in our rundown of the most common houseplant pests.
Step Four: Deal with the Soil Stage
Thrips drop into the soil to pupate, so treating only the leaves lets the cycle continue. Yellow sticky traps laid flat on the soil catch adults as they emerge and help you track whether numbers are falling. For heavier infestations, biological controls such as predatory mites (Amblyseius species) or the nematode Steinernema feltiae target the soil stage without chemicals.
Step Five: Prevent Reinfestation
Thrips usually arrive on a new plant or on cut flowers. Always quarantine new houseplants for a couple of weeks before they join the collection, and check them over first. Keep inspecting your plants weekly; catching a handful of thrips early is far easier than clearing an established outbreak.