Certain houseplants genuinely do repel some common pests, thanks to natural compounds in their leaves and stems that insects and rodents find unpleasant. They won’t guarantee you never see a mouse or spider again, but as part of a broader pest-prevention approach, they’re a real, low-effort addition. Here’s what actually has some backing.
Plants That May Help Deter Mice
Peppermint
Mice have a strong aversion to the scent of peppermint, and this is one of the more commonly cited and reasonably supported plant-based deterrents. Keeping a potted peppermint plant near entry points, or using peppermint essential oil on cotton balls in problem areas, may help discourage mice from settling in, though it works better as a deterrent for areas without an existing infestation than as a way to remove mice that are already established.
Plants That May Help Deter Spiders and Insects
Lavender
Lavender’s scent is disliked by many insects, including moths and mosquitoes, and has some anecdotal support for spider deterrence as well, likely because it also reduces the smaller insects spiders feed on.
Mint
Beyond mice, mint’s strong scent is also unappealing to many insects, including ants and spiders, for similar reasons.
Chrysanthemums
Chrysanthemums contain pyrethrin, a compound that’s actually extracted and used as an active ingredient in many commercial insecticides. Live chrysanthemum plants offer a much more modest version of this effect than the concentrated product, but they’re one of the more scientifically grounded options on this list.
Citronella-scented geraniums
These release a citronella-like scent that’s widely used in commercial mosquito repellents, making them a reasonable, if modest, addition for outdoor mosquito deterrence.
Realistic Expectations
Plants can meaningfully contribute to pest deterrence, but they work as one layer of a broader strategy, not a standalone solution. The habits that matter more for actually keeping pests out are sealing entry points (gaps around doors, windows, and utility lines), keeping food stored properly, reducing clutter that gives pests places to hide, and addressing any existing moisture problems that attract insects. A peppermint plant on the windowsill won’t outweigh an open gap under the door.
Frequently Asked Questions
Will these plants get rid of an existing mouse or spider problem?
Not reliably on their own — they’re better used as a preventive deterrent than a solution for an active infestation, which typically needs traps, sealing entry points, or professional pest control.
Are these plants safe to have around pets?
Not all of them — some, including certain chrysanthemum varieties, can be toxic to cats and dogs if ingested. Check pet safety for any specific plant before bringing it into a home with animals.
Do I need a lot of these plants for them to work?
More plants placed strategically near entry points and problem areas will have more effect than a single plant somewhere in the house, but even a few plants are unlikely to fully replace proper pest-proofing.
Is it better to use essential oils instead of live plants?
Essential oils are generally more concentrated and may have a stronger, more immediate scent effect, though they need to be reapplied more often than a living plant that continuously releases its natural compounds.
The Bottom Line
Peppermint, lavender, mint, and chrysanthemums have genuine, modest pest-deterrent properties, but think of them as a helpful addition, not a replacement for sealing entry points and basic pest prevention.
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