Well since I was mainly interested in getting as many seeds as possible, I let them go till it appeared 90 plus percent of the seeds were mature.
I harvested one plant at 11 weeks and the other one about a week later.
After a month plus of drying in a open container, Im getting good germination rates.
One curious thing, I seem to be getting two males for every female. Though I havent sprouted a real big sample. So I cant say whether that percentage will be the norm.
Since Im running a small operation, the Autoflower strains work very well.
Good luck.