Citronella has a specific aroma that can be effective in repelling mosquitoes and insects. The height of this plant is between 40-110 centimeters, the stem is weak and gray-green in color, and the leaves are narrowly striped and the edges will be rolled back while there is white powder on the surface. It is mainly distributed in China's Yunnan, Jiangxi, Shaanxi, Gansu and other places, suitable for growing in a hot and rainy environment, sufficient light is very helpful for it.