Lemon balm herb  (Melissa officinalis) in a 7.5cm pot

The lemon balm plant (Melissa officinalis) is actually a member of the mint family and is a perennial herb. It grows as a bushy, leafy herb with a pleasant lemon smell and small white flowers. 
Lemon balm is a bushy perennial herb with oval, lemon-scented leaves with scalloped edges, and leafy spikes of creamy-white or pale purple flowers in summer. Fresh or dried leaves can be used to make herb teas, while leaves will give a lemony kick to salads, sauces, vinegars and fish dishes – they are best used fresh, rather than cooked.