Marigolds - Marigolds release a chemical insecticide that repells bugs and mosquitos.
Bee Balm - As it grows and blooms in your garden, it releases fragrances mosquitoes dislike (so does basil, by the way).
Sage - Use sage fresh by crushing leaves and rubbing on your skin or clothing. Or tie a bundle of sage stems (fresh or dried) and toss them into your firepit or chiminea to create a cloud of mosquito-repelling smoke. Light one end of a sage bunch and let it smolder on a fire-resistant tray.
Variegated Plectranthus - Just brush it gently or splash water onto leaves, and the odor is released. That odor is what helps repel mosquitoes—and a host of other insects. This plant goes by many names, including Madagascar spur flower, Swedish ivy and mintleaf. Botanically, look for Plectranthus madagascariensis 'Marginatus’.
Scented Geranium - When crushed or rubbed, scented geranium leaves release their volatile oils.
Catmint - Catmint is the ornamental cousin of catnip, unfurling scented leaves and beautiful flowers. Less attractive to cats than catnip, catmint also possesses mosquito-repelling qualities.
Mint - To release the strong mint oils in leaves, brush against plants or crush leaves and rub on skin or clothing.
Mum - Chrysanthemums contain chemical compounds that act as natural insecticides, which are processed and sold as pyrethrum. It’s a go-to natural pesticide for dealing with fleas, ants, ticks, silverfish and bedbugs.
Thyme - The secret is to crush the leaves to release the volatile oils.