- Herbal lemon grass tea is rather new to the herbal tea world. It was discovered in North America as a caffeine free and natural herb drink. This herb received its name "lemon grass", as the flavor tastes like a perfumy lemon and the plant itself resembles a piece of long bladed grass. This herb has been tried for hundreds of years primarily in Thailand and Vietnam, as one of their most common flavorings to home made meals and in their herbal lemon grass tea. - Lemon grass in Herbal Lemon Grass T