Myth: Citronella candles repel mosquitoes. ... But while the oil of citronella does repel mosquitoes to some degree, “in the amount and concentration that is put out via candles, it's not very effective,” says Joseph Conlon, a technical adviser for the American Mosquito Control Association.

Do citronella candles work to keep mosquitoes away?

Citronella candles are great for setting a mood, but they're not so great for the very thing they're advertised to do: repel mosquitoes. ... At a distance of 1 meter, DEET and oil of lemon eucalyptus sprays reduced mosquito attraction by 60%. The only wearable device that worked was an OFF!

What really works to keep mosquitoes away?

Flowers like marigolds and calendula, along with herbs like rosemary, mint and lemongrass, can also keep biting insects away from the yard. Plant them near your patio or deck for the best benefit.