yea couple weeks,may be couple of months years PMSL,I know he asked for advice (not fact) but thats harsh lol.
Im not to sure but I would think a normal bloom/flower period?
I top a week before bloom/flower and then do the 8-10 week flowering period.
Guess it depends on how long I decide to veg but If your going in to bloom/flower check the straines flowering time and go with that.