Lemon Balm is native to southern Europe, western Asia, the Mediterranean region, and North Africa, but it now grows around the world. It grows up to five feet and produces small white flowers. The leaves of the lemon balm plant produce a lemon fragrance. The plant can be invasive, but if controlled, it can be an attractive garden plant. Ancient cultures used Lemon Balm to treat numerous conditions, Charlemagne ordered that it be planted in every monastery garden.