Gardeners looking to keep rats at bay may find an unlikely ally in lavender, a fragrant herb that doubles as a natural rodent repellent. According to experts, the strong scent of lavender, while pleasant to humans, is highly off-putting to rats, which have sensitive noses and will avoid areas with repulsive smells.
Lavender can grow up to 60 cm tall, with grey-green leaves and purple-blue flowers blooming from late spring to early summer. It can be planted in pots, borders, or beds, and even used as a hedge or ground cover. Flower expert David Denyer explains: “The lavender’s strong smell will stop the rats from smelling any potential food in the garden, making it a zone of no interest to them.”
For those who prefer a spray, lavender oil can be diluted with water—10 to 15 drops per pint—to repel smaller bugs and insects. Alternatively, placing cotton balls soaked in five to seven drops of essential oil in an open jar can deter pests, though the oil should be refreshed every few days to maintain its potency.
Marigolds are another effective deterrent. Rats dislike the flower’s smell and are also frightened by bright colours. Denyer advises planting marigolds along garden borders or entry points, and crushing the leaves and flowers to increase the repellent effect. “Rats, believe it or not, are rather wary creatures, so bright colours can easily frighten them and make them back off,” he adds.
