I don’t know of any culinary use except as a tisane. So when I saw this plant at the local nursery in the spring, I thought why not see how it will thrive in the house this winter? Besides, I liked its looks.
For advice on growing lemon balm, I opened the “Herbs” volume of my Time Life Encyclopedia of Gardening (1977). I also poked around on the Internet. This is what I found: