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Lemon balm is a low-growing perennial herb with ovate- or heart-shaped leaves that emit a lemon odor when bruised. The small yellow or white flowers are attractive to bees and other insects. It is indigenous to the Mediterranean region and western Asia, and widely naturalized in Europe, Asia, and North America.
Even before the Middle Ages, lemon balm was steeped in wine to lift the spirits, help heal wounds, and treat venomous insect bites and stings. Today, lemon balm is often combined with other calming, soothing herbs, such as valerian, chamomile, and hops, to promote relaxation.