8 Indoor Plants That Help Deter Mosquitoes & Flies

If you’re like me, I love houseplants—but I hate when bugs swarm around them.

The good news? Some indoor plants naturally repel mosquitoes and flies, protecting both your greenery and your peace of mind. Here’s how to use them smartly.

How do indoor plants repel mosquitoes and flies?

Certain indoor plants emit volatile compounds like citronellal, geraniol, and pyrethrum that mask human scent or interfere with insect detection.

These biological deterrents are released into the air and naturally reduce insect presence.

What makes a plant a natural insect repellent?

Plants producing strong essential oils or aromatic compounds (such as lemon-scented foliage) can create an environment insects avoid.

These oils act as sensory disruptors and form the core of natural pest control.

Prefer homemade solutions? Learn how to make your own DIY mosquito repellent using safe, effective ingredients.

Which indoor plants repel both mosquitoes and flies?

1. Citronella (Cymbopogon nardus)

This grass-like plant is commonly used in outdoor candles but also thrives indoors with bright light and consistent moisture.

2. Lavender (Lavandula angustifolia)

Its calming scent is not only soothing to humans but is scientifically known to repel various flying pests.

3. Basil (Ocimum basilicum)

Basil is more than a kitchen staple—its fragrant oils actively keep bugs like mosquitoes and fruit flies at bay indoors.

Related: Companion plants for basil

4. Peppermint (Mentha piperita)

This hardy herb emits menthol, which repels flies and mosquitoes, and also doubles as a freshening agent in your space.

5. Lemon Balm (Melissa officinalis)

Lemon balm is part of the mint family and produces a lemony scent that repels biting insects effectively indoors.

6. Rosemary (Salvia rosmarinus)

It thrives in containers and dry environments and emits aromatic oils that make it unwelcome to bugs.

7. Marigold (Tagetes spp.)

Studies confirm that marigold essential oils can provide up to 8 hours of protection against mosquitoes. This vibrant plant is both decorative and practical.

8. Catnip (Nepeta cataria)

Catnip’s active compound is highly effective against mosquitoes and works well as a repellent plant indoors when grown in sunlight.

How to grow insect-repelling plants indoors effectively?

Give them proper light, humidity, and prune regularly to maintain essential oil output.

Use breathable pots and well-draining soil to avoid attracting gnats. Learn more in our article on making potting soil for indoor plants.

Can indoor plants fully replace bug sprays or traps?

They help—but they don’t eliminate pests.

Use plants alongside ventilation, screens, and natural sprays (see best natural bug repellents) for a layered defense.

Where should I place these plants in my home?

Strategically position them near windows, doorways, and sleeping areas.

Placement in high-traffic zones enhances their insect-repelling context.

What are the best combinations of repellent plants?

Mix plants with complementary scents (e.g., basil + peppermint + marigold) to layer repellent compounds and create stronger deterrence.

FAQs About Bug-Repelling Indoor Plants

• Do these plants work year-round? Yes, as long as they’re healthy and leafy.
• Can I grow them in low light? Some tolerate shade, but most need bright indirect light.
• Are they safe for pets? Check plant toxicity—basil and lavender are fine; citronella and rosemary require caution.
• Which plant is best for kitchens? Basil or lemon balm—they smell fresh and deter gnats.
• Do I need to crush the leaves? Mashing the leaves releases more oils and increases efficacy.

Curious about indoor plant pests and control? You might also like How to get rid of gnats in the house.