Organic Lemon Grass (Cymbopogon flexuosus) is also called citronella and is often used as a folk remedy to promote sleep and boost immunity. The most popular way of consuming lemongrass is in the form of tea. It is a perennial grass that grows in tropical climates. It is also popular in many parts of the world for flavouring various cuisines and brewed as tea, it is also used as a medicinal herb. Lemongrass is planted and harvested throughout the year except for the months of October and November.