After 8 weeks of veg how long should I expect the flowering stage to last leading to harvest?

A customer has a question and I hope we can get some opinions on it, thanks

After 8 weeks of veg how long should I expect the flowering stage to last leading to harvest ?

Usually its the estimated time plus a couple weeks for transition and a couple extra if you drag (which 90% of growers mess something up) what strain u growing from what breeder and size pot?

diff strains…diff flower time.

put them into flower…after 7 weeks start checking the trichomes. Clear…go longer.
Once 20% cloudy…harvest.

Keep in mind at least one week of flush