Ants are fascinating creatures with many intriguing characteristics (Image: Getty)
As the warmer months roll in, so too does an increase in garden pests – and ants are among the most persistent. In fact, humans are outnumbered by ants nearly 2.5 million to one. With over 15,000 species across the globe, these tiny invaders are likely to show up where they’re least welcome – from your kitchen to your flowerbeds. But don’t reach for the chemical sprays just yet. There’s a natural and fragrant solution that lies in your garden.
Ants are particularly sensitive to smell – they have up to five times more scent receptors than most insects. This heightened sense of smell helps them locate food, but it also makes them vulnerable to strong, essential-oil-rich plants. These highly aromatic plants overwhelm their senses, driving them away without harming your garden’s ecosystem. Here are 14 plants that not only enhance your outdoor space but naturally repel ants. UK gardeners are being encouraged to ‘plant them now’ to get ahead of summer infestations.
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There are over 30 varieties of mint, including spearmint, peppermint, apple mint, and more. [Getty]
1. Mint
Powerfully fragrant, mint disrupts ants’ scent trails, making it difficult for them to navigate. It’s also easy to grow in containers to prevent it from spreading too far.
Rosemary is an ancient symbol of remembrance and fidelity. [Getty]
2. Rosemary
Its woody, herbaceous scent overwhelms ant scent receptors and is ideal for borders or pots near entrances.
Approximately 70% of adult cats are sensitive to the scent of catnip, while others may not respond [Getty]
3. Catnip
More than just a feline favourite, catnip contains nepetalactone, which has been shown to deter ants and other insects effectively.
Sage has a long history of medicinal use, with ancient cultures using it for various ailments [Getty]
4. Sage
The earthy fragrance of sage is unpleasant to ants and can be used in both ornamental and herb gardens.
Pennyroyal can be used as a seasoning in cooking and for scenting wines. [Getty]
5. Pennyroyal
A member of the mint family, pennyroyal emits a strong odour that repels ants and even mosquitoes. However, it’s toxic to pets, so plant with care.
Citronella Grass can be used as a spice in stews, soups, and stir-fries. [Getty]
6. Citronella Grass
Well-known for repelling mosquitoes, citronella grass also deters ants with its citrusy scent.
There are over 847 known species of eucalyptus trees, each with its own unique characteristics. [Getty]
7. Eucalyptus
Its potent essential oils make eucalyptus a natural insect deterrent, especially effective against ants.
Lavender can be added to food, especially sweets, or enjoyed as tea or honey. [Getty]
8. Lavender
Not only loved for its soothing aroma, lavender’s strong scent is unbearable for ants, making it ideal near patios and garden paths.
The Romans called the bay tree “the plant of the good angels” and believed it could ward off thunder [Getty]
9. Bay Laurel
Crushing bay leaves releases oils that disrupt ant scent trails. The plant itself helps repel ants and other insects.
Koreans consume the most garlic per capita [Getty]
10. Garlic
Garlic’s intense smell repels ants and can even be used to make a natural insect spray when blended with water.
Egyptians used thyme for embalming and as a pain relievers and Greeks used it in baths and temples [Getty]
11. Thyme
This low-growing herb produces essential oils that ants dislike, making it a great groundcover option around borders.
Tansy has been traditionally used as a flavoring for puddings, omelettes, and even whiskey [Getty]
12. Tansy
Tansy contains pyrethrins – natural insecticides that affect ants’ nervous systems and deter infestations.
Marigolds have anti-inflammatory and antiseptic properties – a traditional remedy for the skin [Getty]
13. Marigold
These vibrant flowers emit a scent that ants find repulsive. They also attract beneficial insects that prey on pests.
The petals can be used to make tea, and the leaves and stalks can be eaten raw or cooked. [Getty]
14. Chrysanthemum
Another plant rich in pyrethrins, chrysanthemums act as a natural pesticide, repelling not just ants but many garden nuisances.
By strategically planting these ant-repelling species around your garden, home, or greenhouse, you can enjoy a pest-free summer naturally. Whether you’re after an ornamental display or a fragrant herb garden, these 14 plants pull double duty in both beauty and pest control.