I grow two different species of Mondarda in my garden, and there's a third that I sometimes have found growing wild here in Delaware. The common names are Bee-balm, Wild bergamot, and Oswego tea. They're all delicious...
I often make them into teas just on their own, either fresh or dried, and I blend them with black teas and with other herbs, particularly mint.
Blending them with black tea yields something very similar to Earl Grey.
I've never seen these teas commercially available; I would be eager to see what kind of quality people could come up with. I don't know if they're realistic to cultivate commercially. They grow with little effort in my garden and spread readily. They always end up with powdery mildew by the end of the summer, but it doesn't seem to harm the plants and they're always fresh and ready for harvest in the spring, and in wet years there's often enough fresh growth in the summer and early fall to keep gathering them.