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.
1. MintPowerfully 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.
Its woody, herbaceous scent overwhelms ant scent receptors and is ideal for borders or pots near entrances.
3. CatnipMore than just a feline favourite, catnip contains nepetalactone, which has been shown to deter ants and other insects effectively.
4. SageThe earthy fragrance of sage is unpleasant to ants and can be used in both ornamental and herb gardens.
5. PennyroyalA 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.
6. Citronella GrassWell-known for repelling mosquitoes, citronella grass also deters ants with its citrusy scent.
7. EucalyptusIts potent essential oils make eucalyptus a natural insect deterrent, especially effective against ants.
8. LavenderNot only loved for its soothing aroma, lavender's strong scent is unbearable for ants, making it ideal near patios and garden paths.
9. Bay LaurelCrushing bay leaves releases oils that disrupt ant scent trails. The plant itself helps repel ants and other insects.
10. GarlicGarlic's intense smell repels ants and can even be used to make a natural insect spray when blended with water.
11. ThymeThis low-growing herb produces essential oils that ants dislike, making it a great groundcover option around borders.
12. TansyTansy contains pyrethrins - natural insecticides that affect ants' nervous systems and deter infestations.
13. MarigoldThese vibrant flowers emit a scent that ants find repulsive. They also attract beneficial insects that prey on pests.
14. ChrysanthemumAnother 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.