They grow in North America. It can save you a trip to the doctors.
https://practicalselfreliance.com/foraging-mullein/
https://thefewellhomestead.com/medicinal-uses-of-mullein-grow-harvest-and-usese/
https://draxe.com/nutrition/mullein/
https://www.healthline.com/health/mullein-leaf
https://www.webmd.com/diet/health-benefits-mullein-tea
https://www.peacehealth.org/medical-topics/id/hn-2133009#:~:text=As%20a%20dried%20product%2C%201,used%20three%20times%20per%20day.&text=Mullein%20is%20sometimes%20combined%20with,extract%20directly%20in%20the%20ear.
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