Lemongrass looks like grass, but has a larger size. The leaves are very rough and have sharp edges on the sides. When the leaves are torn, the distinctive scent will spread immediately. Lemongrass is often used in the kitchen as a spice. The scent is so distinct that it is often used as a natural mosquito repellent. The community tends to plant lemongrass in the yard of a house as a mediÂcal plant.