Natural Mosquito Repellent! Lovely lemon scent. Height 24-36 inches, spread 12-15 inches Grows well both in and outdoors Zone 9-11, they need to be brought indoors during the winter in cooler zones. Natural Mosquito Repellent! A member of the geranium family, mosquito plant carries the fragrance of citronella in its foliage. When a leaf is crushed and rubbed on the skin, it smells wonderful and helps naturally repel mosquitoes. (The plant itself does not act as a deterrent to the pests.) Though growing mosquito plant is not as effective as using bottled repellents, mosquito plant works gently, and when you grow it in your garden, it is always on hand. Plants owe their medium green texture to the lacy leaves. Growing upright to 2 to 3 feet in height, they can be used as a summer border or one of several contrasting textures in a garden composition or a large mixed container.