Pelargonium citrosa is a plant whose flowers and leaves are used together. It enjoys the beautiful name of "touch香" because it can emit a comfortable fragrance after being touched. Also, because of its strong sweet smell, which is very similar to the smell of apples, it also enjoys the reputation of "apple herb". Its smell is refreshing, and it is popular in the market. It is suitable for potting, and it should be placed at a high place or hung indoors, and it can also be used as a decorative item for tables and desks. Its leaves can be steeped in tea or wine, with an inviting strange fragrance.