Melissa officinalis, known as lemon balm, is a perennial herbaceous plant in the mint family Lamiaceae, . It grows to 70–150 cm (28–59 in) tall.The leaves have a gentle lemon scent, related to mint. Lemon balm grows in clumps and spreads vegetatively, as well as by seed. In mild temperate zones, the stems of the plant die off at the start of the winter, but shoot up again in spring. Lemon balm grows vigorously and should not be planted where it will spread into other plantings.
Lemon balm is often used as flavouring in ice cream and herbal teas, both hot and iced, often in combination with other herbs such as spearmint. It is also frequently paired with fruit dishes or candies. It can be used in fish dishes and is the key ingredient in lemon balm pesto.
In the traditional Austrian medicine, M. officinalis leaves have been prescribed for internal (as tea) or external (essential oil) application for the treatment of disorders of the gastrointestinal tract, nervous system, liver, and bile. It is also a common addition to peppermint tea, mostly because of its complementing flavor. Lemon balm contains eugenol, tannins, and terpenes