Tansy
Tansy may not be the most popular garden flower, but it’s an old-fashioned mosquito repellent with a long history. Its fern-like leaves and bright yellow button-like flowers make it visually appealing, while its camphor-like scent drives away mosquitoes and flies. Tansy thrives in full sun and well-drained soil, and it’s quite hardy once established. It’s best to plant tansy away from areas where kids or pets play, as the plant can be toxic if ingested. Still, in the right spot, it serves as a low-maintenance, effective deterrent. To boost its scent, crush a few leaves occasionally or place them near outdoor gathering spots.