Mosquitoes and flies are among the most annoying garden pests, turning peaceful outdoor spaces into buzzing, biting nightmares. The best plants for mosquitoes and flies offer a natural, chemical-free solution to keep these pests at bay while adding beauty, fragrance, and greenery to your garden. Choosing the right repellent plants is an effective, environmentally friendly approach to pest control.

Understanding which plants repel mosquitoes and flies depends on their natural compounds, essential oils, and scents that these insects find offensive. Plants like citronella, lavender, and basil produce strong fragrances that mask the scents mosquitoes and flies use to locate their hosts. By strategically placing these plants around patios, doorways, and seating areas, you can create a natural barrier against pests.

Many mosquito-repelling plants have been used for centuries in traditional medicine and pest control, with modern research confirming their effectiveness. These plants contain compounds like citronellal, geraniol, and eucalyptol that interfere with insects’ ability to detect carbon dioxide and body odours. As a result, they provide a safe, pleasant-smelling alternative to chemical repellents.

In this guide, the best plants for mosquitoes and flies are evaluated based on their repellent effectiveness, ease of cultivation, growth habits, and additional garden benefits. You’ll find expert recommendations for container plants, border perennials, and aromatic herbs that will transform your outdoor space into a pest-free sanctuary.

15 Best Plants For Mosquitoes And Flies

1. Citronella (Cymbopogon nardus) – Best Known Mosquito Repellent Plant

Citronella is the best known mosquito repellent plant, producing the signature scent found in candles and sprays that effectively masks the attractants mosquitoes use to find humans. Its tall, grass-like foliage releases citronellal oil when brushed or crushed, creating a protective zone around patios and seating areas. As a result, it is the most recognized natural mosquito repellent.

This tropical grass produces dense clumps of aromatic leaves that can grow up to 6 feet tall in warm climates, making it perfect for borders and container planting. Moreover, the essential oil content is highest when plants are grown in full sun and warm conditions. Therefore, it offers effective mosquito repellent properties with ornamental grass-like appeal.

Citronella is easy to grow in large containers or garden beds, requiring full sun and well-drained soil to thrive. Furthermore, it is a tender perennial in cooler climates and should be protected from frost. Overall, Citronella delivers proven mosquito repellent power with attractive, grassy foliage.

Pros:

• Proven mosquito repellent
• Fragrant foliage
• Attractive grass-like form
• Fast-growing
• Great for containers

Cons:

• Tender in cold climates
• Needs full sun
• Requires regular watering

2. Lavender (Lavandula) – Best Fragrant Mosquito Repellent Plant

Lavender is the best fragrant mosquito repellent plant, producing aromatic purple spikes that mosquitoes and flies find offensive while humans find calming. Its essential oils, particularly linalool and camphor, are natural insect repellents that work effectively when planted near doors, windows, and seating areas. As a result, it is a dual-purpose plant for beauty and pest control.

This Mediterranean herb produces fragrant flowers from midsummer to autumn, attracting bees and butterflies while repelling mosquitoes and flies. Moreover, its drought tolerance and low-maintenance nature make it perfect for sunny borders and containers. Therefore, it offers beautiful fragrance with effective mosquito repellent properties.

Lavender is easy to grow in well-drained soil and full sun, with its neat, mounding habit providing structure to gardens. Furthermore, the dried flowers can be used in sachets and potpourri to repel pests indoors. Overall, Lavender delivers calming fragrance with natural mosquito repellent power.

Pros:

• Beautiful fragrance
• Effective mosquito repellent
• Attracts pollinators
• Drought-tolerant
• Great for drying

Cons:

• Needs full sun
• Requires well-drained soil
• Can become woody

3. Basil (Ocimum basilicum) – Best Culinary Herb For Repelling Mosquitoes

Basil is the best culinary herb for repelling mosquitoes, producing strong, aromatic oils that mosquitoes and flies find highly offensive. Its spicy, pungent scent masks the carbon dioxide and body odours that attract biting insects, making it perfect for planting near outdoor dining and seating areas. As a result, it offers double duty as a kitchen herb and pest repellent.

This fast-growing herb produces fragrant leaves that are essential in cooking, while its volatile oils effectively repel mosquitoes and flies. Moreover, it thrives in containers and garden beds, making it accessible for any gardener. Therefore, it offers culinary value with effective mosquito repellent properties.

Basil is easy to grow in full sun and well-drained soil, with regular harvesting encouraging bushier growth and stronger scent. Furthermore, multiple varieties, including lemon basil and cinnamon basil, offer different fragrance profiles. Overall, Basil delivers delicious culinary value with natural mosquito repellent power.

Pros:

• Culinary herb value
• Effective mosquito repellent
• Fast-growing
• Great for containers
• Multiple varieties available

Cons:

• Annual (must replant)
• Needs consistent moisture
• Susceptible to cold

4. Lemon Balm (Melissa officinalis) – Best Lemon-Scented Mosquito Repellent

Lemon Balm is the best lemon-scented mosquito repellent plant, producing fresh, citrusy fragrance that mosquitoes and flies find unpleasant. Its high citronellal content makes it an effective natural repellent, while its vigorous growth and attractive foliage add beauty to any garden. As a result, it is essential for natural pest control in outdoor spaces.

This hardy perennial produces lemon-scented leaves that release their fragrance when brushed, effectively repelling mosquitoes and flies. Moreover, it is easy to grow and spreads readily, making it perfect for filling gaps in borders and containers. Therefore, it offers fresh, citrusy fragrance with effective mosquito repellent properties.

Lemon Balm is easy to grow in sun or partial shade and any well-drained soil, with its spreading habit providing attractive ground cover. Furthermore, the leaves can be used for tea, culinary flavouring, and potpourri. Overall, Lemon Balm delivers fresh lemon scent with natural mosquito repellent power.

Pros:

• Fresh lemon scent
• Effective mosquito repellent
• Hardy perennial
• Easy to grow
• Versatile culinary use

Cons:

• Can spread vigorously
• May become invasive
• Needs containment

5. Rosemary (Rosmarinus officinalis) – Best Woody Herb For Repelling Mosquitoes

Rosemary is the best woody herb for repelling mosquitoes, producing aromatic, needle-like foliage that mosquitoes and flies find highly offensive. Its strong, piney scent masks attractants while providing culinary value and evergreen structure to gardens. As a result, it is essential for Mediterranean-style gardens and patios.

This drought-tolerant shrub produces fragrant leaves that are essential in Mediterranean cooking, while its essential oils effectively repel mosquitoes and flies. Moreover, it thrives in full sun and well-drained soil, requiring minimal care once established. Therefore, it offers culinary value with effective mosquito repellent properties.

Rosemary is easy to grow in containers and garden beds, with its upright or trailing habit suiting various garden styles. Furthermore, it is evergreen, providing year-round fragrance and structure. Overall, Rosemary delivers aromatic culinary value with natural mosquito repellent power.

Pros:

• Culinary herb value
• Effective mosquito repellent
• Evergreen foliage
• Drought-tolerant
• Great for containers

Cons:

• Needs full sun
• Requires well-drained soil
• Can be frost-sensitive

6. Catnip (Nepeta cataria) – Best Mosquito Repellent Plant For Cat Lovers

Catnip is the best mosquito repellent plant for cat lovers, producing nepetalactone, a compound that is ten times more effective at repelling mosquitoes than DEET. Its vigorous growth and attractive flowers make it a valuable addition to gardens, while its effect on cats adds entertainment value. As a result, it is a unique and highly effective mosquito repellent.

This hardy perennial produces clusters of white or purple flowers that attract pollinators, while its aromatic leaves repel mosquitoes and flies effectively. Moreover, it is easy to grow and spreads readily, making it perfect for filling gaps in borders. Therefore, it offers highly effective mosquito repellent with entertaining properties for cat owners.

Catnip is easy to grow in sun or partial shade and any well-drained soil, with its spreading habit providing attractive ground cover. Furthermore, the dried leaves can be used as a natural insect repellent in sachets and sprays. Overall, Catnip delivers powerful mosquito repellent with unique feline appeal.

Pros:

• Highly effective mosquito repellent
• Attractive flowers
• Easy to grow
• Drought-tolerant
• Entertaining for cats

Cons:

• Can attract cats
• Can spread vigorously
• May become invasive

7. Marigold (Tagetes) – Best Colourful Mosquito Repellent Plant

Marigold is the best colourful mosquito repellent plant, producing vibrant yellow, orange, and red flowers that release pyrethrum, a natural insect repellent. Its cheerful blooms and pest-repelling properties make it perfect for borders, containers, and vegetable gardens. As a result, it is an essential addition to pest-free gardens.

This easy-to-grow annual produces bright, long-lasting flowers that repel mosquitoes, flies, and other garden pests. Moreover, its pyrethrum content makes it effective against a wide range of insects, while its compact habit suits any garden style. Therefore, it offers colourful blooms with effective mosquito and fly repellent properties.

Marigold is easy to grow from seed in full sun and well-drained soil, with its continuous blooms providing colour from summer through autumn. Furthermore, it is excellent for companion planting in vegetable gardens, repelling many common pests. Overall, Marigold delivers cheerful colour with natural mosquito repellent power.

Pros:

• Bright colourful blooms
• Effective mosquito repellent
• Easy from seed
• Excellent for companion planting
• Long flowering season

Cons:

• Annual (must replant)
• Needs full sun
• Susceptible to mildew

8. Mint (Mentha) – Best Spreading Mosquito Repellent Plant

Mint is the best spreading mosquito repellent plant, producing strong, refreshing scent that mosquitoes and flies find highly offensive. Its vigorous growth and versatility make it perfect for containers and garden beds, with its menthol content providing effective pest protection. As a result, it is essential for natural pest control in outdoor spaces.

This hardy perennial produces aromatic leaves that are essential in cooking and beverages, while its essential oils effectively repel mosquitoes and flies. Moreover, it is incredibly easy to grow and spreads rapidly, making it perfect for filling gaps. Therefore, it offers culinary value with effective mosquito repellent properties.

Mint is easy to grow in containers or garden beds, though it should be contained to prevent spreading. Furthermore, it is available in many varieties, including peppermint and spearmint, offering different fragrance profiles. Overall, Mint delivers refreshing scent with natural mosquito repellent power.

Pros:

• Culinary and beverage value
• Effective mosquito repellent
• Easy to grow
• Fast-spreading
• Multiple varieties available

Cons:

• Can be invasive
• Needs containment
• Can overwhelm other plants

9. Eucalyptus – Best Tree-Like Mosquito Repellent Plant

Eucalyptus is the best tree-like mosquito repellent plant, producing aromatic leaves that contain citronellal and eucalyptol, powerful natural insect repellents. Its tall, graceful form and distinctive fragrance make it perfect for larger gardens, while its essential oil is widely used in commercial insect repellents. As a result, it is a valuable addition for natural pest control.

This fast-growing tree produces aromatic leaves that effectively repel mosquitoes and flies, with its essential oil content being highest in warm conditions. Moreover, it is drought-tolerant and adaptable to various soil types, making it a versatile garden choice. Therefore, it offers powerful mosquito repellent with attractive, tree-like form.

Eucalyptus is easy to grow in large containers or garden beds, with its silvery-blue foliage providing year-round interest. Furthermore, it can be pruned to maintain a manageable size, making it suitable for smaller gardens. Overall, Eucalyptus delivers effective mosquito repellent with striking foliage.

Pros:

• Powerful mosquito repellent
• Aromatic silvery-blue foliage
• Fast-growing
• Drought-tolerant
• Distinctive appearance

Cons:

• Can become large
• May need pruning
• Frost-sensitive in cold climates

10. Scented Geraniums (Pelargonium) – Best Citronella-Scented Mosquito Repellent

Scented Geraniums are the best citronella-scented mosquito repellent plants, producing fragrant foliage with scents including citronella, rose, lemon, and mint. Their essential oils effectively repel mosquitoes and flies, while their trailing habit makes them perfect for hanging baskets and window boxes. As a result, they are essential for pest-free patios and porches.

These sun-loving plants produce scented foliage that releases fragrance when brushed, effectively repelling mosquitoes and flies. Moreover, they are drought-tolerant and easy to grow, with their trailing habit making them perfect for containers. Therefore, they offer fragrant foliage with effective mosquito repellent properties.

Scented Geraniums are easy to grow in containers, hanging baskets, and window boxes, with their attractive leaves providing year-round interest. Furthermore, they are available in many scents, including citronella, rose, and lemon. Overall, Scented Geraniums deliver fragrant foliage with natural mosquito repellent power.

Pros:

• Fragrant foliage in various scents
• Effective mosquito repellent
• Trailing growth for containers
• Heat and drought-tolerant
• Attractive foliage year-round

Cons:

• Needs full sun
• Susceptible to cold
• Can become leggy

11. Lemongrass (Cymbopogon citratus) – Best Fresh Lemon-Scented Mosquito Repellent

Lemongrass is the best fresh lemon-scented mosquito repellent plant, producing high levels of citronellal and geraniol that effectively repel mosquitoes and flies. Its culinary value in Asian cooking adds practical benefits, while its tall, grass-like form adds structure to gardens. As a result, it is essential for edible and pest-repellent gardens.

This tropical grass produces fresh lemon-scented leaves that are essential in Asian cuisine, while its essential oils effectively repel mosquitoes and flies. Moreover, it is easy to grow in containers and garden beds, with its tall form adding vertical interest. Therefore, it offers culinary value with effective mosquito repellent properties.

Lemongrass is easy to grow in full sun and well-drained soil, with its clumping habit making it perfect for borders and containers. Furthermore, it is a tender perennial in cooler climates and should be protected from frost. Overall, Lemongrass delivers fresh lemon scent with natural mosquito repellent power.

Pros:

• Culinary value
• Effective mosquito repellent
• Fresh lemon scent
• Tall, structural form
• Easy to grow

Cons:

• Tender in cold climates
• Needs regular watering
• Can be large

12. Pennyroyal (Mentha pulegium) – Best Powerful Mosquito Repellent Herb

Pennyroyal is the best powerful mosquito repellent herb, producing strong, pungent scent that mosquitoes and flies find highly offensive. Its low-growing, spreading habit makes it perfect for ground cover and container edges, while its traditional use as a natural insect repellent is well-documented. As a result, it is a valuable addition to pest control strategies.

This hardy perennial produces aromatic leaves that are highly effective at repelling mosquitoes, flies, and other insects. Moreover, its low-growing habit makes it perfect for filling gaps and suppressing weeds. Therefore, it offers powerful mosquito repellent with useful ground cover properties.

Pennyroyal is easy to grow in sun or partial shade and any well-drained soil, with its spreading habit providing attractive ground cover. Furthermore, it is a member of the mint family and should be contained to prevent spreading. Overall, Pennyroyal delivers powerful mosquito repellent with practical ground cover benefits.

Pros:

• Powerful mosquito repellent
• Low-growing ground cover
• Suppresses weeds
• Easy to grow
• Traditional insect repellent

Cons:

• Can be toxic if ingested
• Can spread aggressively
• Needs containment

13. Thyme (Thymus) – Best Groundcover Mosquito Repellent Plant

Thyme is the best groundcover mosquito repellent plant, producing aromatic, low-growing foliage that releases its scent when brushed, repelling mosquitoes and flies. Its culinary value and cascading habit make it perfect for containers, rock gardens, and path edges. As a result, it is essential for dual-purpose ground cover and pest control.

This drought-tolerant herb produces fragrant leaves that are essential in cooking, while its essential oils effectively repel mosquitoes and flies. Moreover, its low, spreading habit makes it perfect for container edges and rock gardens. Therefore, it offers culinary value with effective mosquito repellent properties.

Thyme is easy to grow in well-drained containers and full sun, with its low, spreading habit providing attractive ground cover. Furthermore, it is evergreen, providing year-round fragrance and texture. Overall, Thyme delivers versatile, heat-tolerant foliage with natural mosquito repellent power.

Pros:

• Culinary herb value
• Effective mosquito repellent
• Low-growing ground cover
• Drought-tolerant
• Evergreen foliage

Cons:

• Slow-growing
• Needs well-drained soil
• Can become woody

14. Geranium (Pelargonium citrosum) – Best Citronella-Scented Geranium

Geranium (Pelargonium citrosum) is the best citronella-scented geranium, producing strongly scented foliage that effectively repels mosquitoes and flies. Its attractive, lobed leaves and pink or white flowers add beauty to containers and borders, while its mosquito-repelling properties make it a patio essential. As a result, it is ideal for outdoor seating areas.

This scented geranium produces citronella-scented leaves that release their fragrance when brushed, effectively repelling mosquitoes and flies. Moreover, it is drought-tolerant and easy to grow, with its compact habit making it perfect for containers. Therefore, it offers citronella scent with effective mosquito repellent properties.

Citronella Geranium is easy to grow in containers, window boxes, and garden beds, with its attractive foliage providing year-round interest. Furthermore, it produces pink or white flowers in summer, adding extra ornamental value. Overall, Citronella Geranium delivers proven mosquito repellent with attractive container-friendly growth.

Pros:

• Citronella-scented foliage
• Effective mosquito repellent
• Compact growth for containers
• Attractive pink or white flowers
• Drought-tolerant

Cons:

• Needs full sun
• Susceptible to cold
• Can become leggy

15. Tansy (Tanacetum vulgare) – Best Traditional Fly Repellent Plant

Tansy is the best traditional fly repellent plant, producing clusters of button-like yellow flowers and aromatic foliage that effectively repels flies, ants, and other insects. Its historical use as a natural insect repellent and its long flowering season make it a valuable addition to gardens. As a result, it is essential for natural fly control in outdoor spaces.

This hardy perennial produces aromatic, ferny leaves and yellow flowers from summer through autumn, effectively repelling flies and other insects. Moreover, it is easy to grow and spreads readily, making it perfect for filling gaps in borders. Therefore, it offers traditional fly repellent with long-lasting flower interest.

Tansy is easy to grow in sun or partial shade and any well-drained soil, with its upright habit providing attractive structure. Furthermore, the dried leaves and flowers can be used in sachets and dried flower arrangements. Overall, Tansy delivers traditional fly repellent with attractive, long-lasting flowers.

Pros:

• Traditional fly repellent
• Attractive yellow flowers
• Long flowering season
• Easy to grow
• Historical pest control use

Cons:

• Can spread aggressively
• Can be toxic if ingested
• May become invasive

7 Essential Factors For Choosing Plants For Mosquitoes And Flies

• Repellent effectiveness: Different plants have varying levels of effectiveness against mosquitoes and flies. Citronella, catnip, and marigolds are among the most effective, while others provide moderate protection.
• Plant placement: Place repellent plants strategically around seating areas, doorways, and windows to create a protective barrier. Grouping plants together increases their effectiveness.
• Aromatic intensity: Plants with stronger fragrances generally provide better pest protection. Crush or brush leaves to release essential oils and maximise repellent effect.
• Growth habits: Consider plant size and spread when selecting repellent plants. Trailing plants like thyme and scented geraniums work well in containers, while tall plants like lemongrass and eucalyptus suit borders.
• Climate adaptability: Choose plants suited to your climate and growing conditions. Some species are tender perennials, while others are hardy and drought-tolerant.
• Additional benefits: Many mosquito-repellent plants offer extra value, including culinary uses, ornamental flowers, and wildlife attraction. Choose plants that provide multiple benefits for your garden.
• Environmental factors: Consider wind direction, shade, and moisture levels when placing repellent plants. Most require full sun and well-drained soil for optimal essential oil production.

Frequently Asked Questions About Best Plants For Mosquitoes And Flies

1. What plants repel mosquitoes and flies best?

The best plants for repelling mosquitoes and flies include Citronella, Lavender, Basil, Lemon Balm, Rosemary, Catnip, Marigold, Mint, Eucalyptus, Scented Geraniums, Lemongrass, Pennyroyal, Thyme, Citronella Geranium, and Tansy. These plants produce strong scents that interfere with insects’ ability to locate hosts.

2. Does citronella plant really repel mosquitoes?

Yes, citronella plants (Cymbopogon nardus) contain citronellal, a compound that effectively masks the scents mosquitoes use to find humans. However, the plant is most effective when leaves are crushed or brushed, releasing the essential oils.

3. What plants keep flies away?

Plants that keep flies away include Tansy, Basil, Marigold, Lavender, Rosemary, and Mint. These plants produce strong fragrances that flies find offensive, making them effective natural repellents.

4. How do I use plants to repel mosquitoes?

Use plants to repel mosquitoes by placing them strategically around outdoor living spaces, crushing leaves to release essential oils, and using dried leaves in sachets and potpourri. For best results, combine multiple repellent plants.

5. Can I grow mosquito repellent plants indoors?

Yes, many mosquito repellent plants can be grown indoors, including Basil, Mint, Lavender, and Lemon Balm. Place them near windows and doors to help prevent insects from entering your home.

6. Do mosquito repellent plants really work?

When used correctly, mosquito repellent plants provide moderate to effective protection. Their essential oils interfere with insects’ ability to detect carbon dioxide and body odours, making them a useful part of an integrated pest control strategy.

7. What is the best plant to keep mosquitoes away naturally?

Citronella and Catnip are among the most effective plants for keeping mosquitoes away naturally. Catnip contains nepetalactone, which is ten times more effective than DEET in some studies, while citronella is the most widely recognized natural repellent.

Conclusion

In conclusion, Citronella is the best known and most effective plant for repelling mosquitoes and flies, with its signature scent providing proven protection in gardens and outdoor spaces. Its versatility and ease of growth make it an essential addition to any pest-control strategy.

The runner-up, Lavender, offers beautiful fragrance and effective mosquito repellent properties with drought tolerance and low maintenance requirements, making it perfect for sunny borders and containers. Both options demonstrate that natural pest control can be beautiful and effective.

For culinary value, Basil and Rosemary provide kitchen herbs alongside pest protection. For colourful displays, Marigolds add bright blooms while repelling pests. For ground cover, Thyme and Pennyroyal offer practical solutions for path edges and rock gardens.

Start creating a pest-free garden today with these natural repellent plants and enjoy mosquito-free outdoor living without harsh chemicals.