14 Natural Plants That Repel Unwanted Insects and Pests
Discover how to keep your garden pest-free with beautiful, functional plants that naturally deter bugs and unwanted insects.
14 Plants That Naturally Repel Unwanted Insects
Unwanted insects can threaten the health and appearance of any garden, patio, or interior space. While chemical repellents and pesticides exist, they often harm beneficial insects and disrupt the local ecosystem. Fortunately, a variety of plants offer natural, sustainable ways to keep common pests at bay. In this guide, you’ll find detailed information on the best insect-repelling plants, including their characteristics, gardening know-how, and specific pests each variety helps deter.
Why Choose Natural Pest-Repelling Plants?
- Eco-Friendly: These plants support pollinators and do not harm humans, pets, or beneficial insects.
- Low Maintenance: Many are hardy, easy to grow, and thrive in containers or garden beds.
- Multipurpose: Several provide culinary benefits, beautiful blooms, and aromatic foliage.
Herbs That Deter Unwanted Insects
Herbs are a top choice for natural pest control, thanks to their strong scents and essential oils. Many repel multiple types of insects while also being useful in cooking and fragrance.
| Herb | Pests Repelled | Growing Tips |
|---|---|---|
| Basil | Mosquitoes, flies | Requires sunny spots and regular watering. Ideal in pots near seating areas. Pinch flowers for bushier growth. |
| Lavender | Moths, fleas, mosquitoes | Thrives in well-drained, lean soil and full sun. Avoid overwatering. Prune after flowering to shape. |
| Rosemary | Mosquitoes, cabbage moths, carrot flies, beetles | Prefers full sun, drought-resistant, well-draining alkaline soil. Grows well in containers and can be shaped as borders. |
| Mint | Ants, mosquitoes, flies | Plant in containers to avoid aggressive spreading. Thrives in part shade and moist soil. |
| Sage | Cabbage moths, beetles | Prefers full sun, well-drained soil. Good companion for brassicas like cabbage and broccoli. |
| Catnip / Catmint | Mosquitoes, cockroaches, termites | Easy to grow in full sun or part shade. Contains nepetalactone, ten times more effective than DEET in studies. Can attract cats to your garden. |
Flowers That Keep Bugs Away
Several ornamental flowers are known for their pest-repelling capabilities. They add vivid color and volume to the garden while supporting insect management.
- Marigolds: Repel mosquitoes, aphids, nematodes, thrips, whiteflies, beetles, squash bugs, and tomato hornworms. Their robust scent makes them perfect for borders, vegetable gardens, and containers.
Bloom Time: Late spring to frost. - Chrysanthemums: Contain pyrethrin, a natural insecticide, and help deter ants, ticks, roaches, silverfish, and even bed bugs.
Bloom Time: Late summer to fall. - Petunias: Repel aphids, tomato hornworms, leafhoppers, and asparagus beetles. Their sticky hairs can also trap smaller insects.
Bloom Time: Late spring to first frost. - Bee Balm: Attracts pollinators but is believed to deter mosquitoes with its aromatic foliage.
Grasses and Companion Plants
These varieties release powerful aromas and oils, making them exceptionally good at keeping pests away and blending into garden designs.
- Citronella Grass (Lemongrass): The natural source of citronella oil, used in mosquito repellents. Best grown in pots, full sun, and protected from cold weather.
- Nasturtiums: Trap crop for aphids; also deter squash bugs, whiteflies, and beetles. Useful in vegetable plots as companion plants for tomatoes and beans.
Vegetables That Naturally Deter Pests
- Garlic: Releases sulfur compounds that keep aphids, mosquitoes, and cabbage worms at bay. A strong companion for peppers and tomatoes.
- Onions: Keep carrot flies and aphids away when planted alongside carrots or lettuce.
- Chives: Their aroma repels aphids and Japanese beetles, and even discourages deer and rabbits.
How to Use Pest-Repelling Plants Effectively
- Companion Planting: Mix pest-deterring herbs, flowers, and vegetables among more vulnerable crops to reduce infestations naturally.
- Pots and Borders: Position containers near patios, windows, and entrances to keep mosquitoes and flies from gathering.
- Trap Crops: Use plants like nasturtiums to divert aphids and beetles away from vegetables.
- Routine Maintenance: Prune faded flowers, harvest herbs regularly, and monitor soil moisture for optimum plant health.
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Considerations, Warnings & Tips
- Container Growth: Mint and citronella grass can be invasive—grow in pots to control spread.
- Safe Usage: Most listed plants are non-toxic; however, always research interactions with pets and children.
- Encouraging Pollinators: Many of these plants, including lavender and bee balm, attract bees and butterflies while deterring harmful pests.
- Regional Suitability: Some plants (citronella grass, rosemary) fare better in warm climates—check zone compatibility.
- Cats and Catnip: Catnip is highly attractive to cats, so expect frequent feline visitors if you plant it outdoors.
Summary Table: Top Plants and Their Target Pests
| Plant Name | Key Insect Targets | Main Benefits | Extras |
|---|---|---|---|
| Basil | Mosquitoes, flies | Edible, easy container growth | Fresh leaves for cooking |
| Lavender | Moths, fleas, mosquitoes | Pollinator friendly, drought tolerant | Aromatic oils used in sachets |
| Rosemary | Mosquitoes, beetles, cabbage moths | Evergreen, culinary herb | Tolerates dry climates |
| Marigolds | Mosquitoes, aphids, beetles | Showy annual, easy to grow | Root secretions deter nematodes |
| Chrysanthemums | Ants, ticks, roaches | Contains pyrethrin | Late season color |
| Petunias | Aphids, hornworms, leafhoppers | Abundant blooms, low maintenance | Ideal for hanging baskets |
| Mint | Ants, mosquitoes, flies | Fragrant groundcover | Multiple culinary uses |
| Nasturtiums | Aphids, beetles, squash bugs | Edible flowers, trap crop | Bright colors for borders |
| Citronella Grass | Mosquitoes | Source of citronella oil | Potted for patios |
| Sage | Cabbage moths, beetles | Hardy herb, low water needs | Attracts beneficial pollinators |
| Catnip | Mosquitoes, cockroaches, termites | Low maintenance perennial | Will attract cats |
| Garlic | Mosquitoes, aphids, cabbage worms | Bulb vegetable | Natural fungicide |
| Onions | Carrot flies, aphids | Easy to grow in rows | Companion for lettuce, carrots |
| Chives | Japanese beetles, aphids | Pungent herb, deer deterrent | Edible flowers |
General Care & Maintenance Guide
Most insect-repelling plants are straightforward to grow, making them suitable for beginner gardeners. Here are essential tips for successful growth:
- Sunlight: The majority prefer full sun (6+ hours daily). Some tolerate partial shade (mint, chives).
- Soil: Well-drained, slightly alkaline soils are optimal. Use cactus or succulent mixes for lavender and rosemary.
- Watering: Allow soil to dry out completely before watering again for drought-tolerant species (rosemary, lavender). Keep consistent moisture for annuals (marigolds, petunias).
- Harvesting: Regular picking enhances new growth in herbs. Deadhead flowers to prolong blooming.
- Winter Care: Move potted perennials indoors in colder climates. Annuals typically die off after frost.
Frequently Asked Questions (FAQs)
Do these plants eliminate all pests?
No single plant will eliminate every pest, but strategic planting can significantly reduce populations of mosquitoes, aphids, beetles, and moths. Combine several varieties for best results.
Are insect-repellent plants safe for pets?
Most listed species are safe, but some (catnip, chrysanthemum, garlic) should be used with caution around pets prone to ingesting large leaves or bulbs. Always monitor pets and do research for your specific breeds.
Can I plant these near food crops?
Absolutely. Plants like basil, marigolds, garlic, and nasturtiums are ideal companions for tomatoes, peppers, lettuce, and other vegetables. They enhance garden health and flavor.
How fast do pest-repelling plants work?
Results may begin within days to weeks, depending on plant maturity, pest pressure, and environmental conditions. Strong scents like citronella, lavender, and basil provide immediate insect deterrence upon leaf bruising or flowering.
Do they attract beneficial insects?
Yes. Most flowers and herbs listed support bees, butterflies, and predatory insects that help maintain a balanced ecosystem.
Tips for Success
- Plan Layout: Group insect-repellent plants near entryways, patios, and vegetable beds.
- Rotate Annually: Switch annuals (marigold, petunia) every year for optimal impact and fresh growth.
- Combine Forces: Blend aromatic herbs with showy flowers to maximize deterrence—both visually and functionally.
- Maintain Health: Remove dead or faded foliage quickly to keep plants vigorous and potent.
Keep Your Garden Pest-Free—Naturally
With a carefully-planned mix of aromatic herbs, bold flowers, and resilient vegetables, you can create a vibrant landscape that naturally resists unwanted insects. Relying on these natural solutions not only protects your plants but also supports the health of pollinators, local wildlife, and your environment. Start planning your natural pest-repellent garden today to enjoy beautiful blooms, bountiful harvests, and bug-free relaxation all season long.
References
- https://www.edengreen.com/blog-collection/plants-that-repel-unwanted-insects
- https://www.gardendesign.com/plants/mosquito-repellent.html
- https://plantersetcetera.com/blogs/plant-guides/10-plants-to-repel-pests
- https://www.gardenia.net/guide/wonderful-plants-that-repel-insects
- https://en.wikipedia.org/wiki/List_of_pest-repelling_plants
- https://www.osgf.org/blog/2021/7/22/buwjs26fo4nxoxckq1s4ffbstxkz1u
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