Wow, a lot of people have long hair! ^^ Um, maybe super long, a whole year? If you do regular treatment, and conditioning, that sort of thing, maybe even longer. I rub oil based products into my scalp once or twice a week to help the growing process. *healthy scalp, healthy hair growth* Mine used to be to my jaw, but now it's almost to shoulder, but I also haven't been doing it for long..less than a month.