I would flush when u see slight signs of amber color. You should end up with 10-20% amber trichomes if you flush at that point. i would guess flush in 2 weeks, harvest 3 weeks. Flowering is pretty much about 8 weeks for all strains, some bit more, some bit less, but its around that time.
Growth and seedlingphase takes 3-4weeks if you dont grow photoperiods. so atleast 12, would say 13 weeks overall.
I also checked your diary now before sending the message. Looks like 3 weeks growth and 5 weeks flowering on your plant, so atleast 3 weeks till harvest. 2 till flushing.