I have mullein growing in my yard–I found some way back in the ’80s and transplanted it to my yard. It is a 2 year plant–it grows the first year, sets seed the 2nd year, dies off but the scattered seed come up year after year.
I like to gather this, dehydrate it and save it to use in teas, tinctures and salves.
Mullein is good for all things lung related and will also help with pain. Making a tea from it requires a bit of washing and straining. The flavor is good, especially when sweetened with honey, but the fuzzy ‘taste’ one gets is a bit distracting.