Citrosa geranium plant releases its smell when touched, it is used as a repellent when the leaves are crushed and rubbed on the skin as mosquitoes are supposed to be offended by its citronella scent. Citronella oil is used in candles, bug sprays and insect repellent products Growing and caring for Citronella Plant is easy. This plant prefers at least six hours of sunlight a day. It should stand near the window It tolerates a variety of soil as long as it’s well draining. The Scented Geranium 'Queen of Lemon' is an excellent patio plant. Geraniums can be reproduced easily from cuttings. The cuttings can be taken any time of year.