If memory serves me right, think I read around 8 wks, give or take. But this sometimes varies, it depends mainly upon your lighting. By looking, I would say it won't be a long one. I say this because that's a young bud, but look at the way its already producing trichromes, even on the bud leaf. Best way to get an answer would be to look it up in a seedbank on line. Most give info & will tell you how long they flower. One thing I can say for sure, it doesn't look like its gonna be a whimp!