That nice sativa strain looks ready to me.
You can't put a lot of faith in the seed grower's descriptions. Those descriptions are basically commercials that attempt to appeal to
as many different growers as possible. I've found that the predicted "finishing times" can be waaaay off. I've got one auto going now
that vegged for 4 weeks, flowered for 3 1/2 weeks and looks ready to go. Manufacturer says another 2 weeks to finish. Wrong.
The white pistils turn color the same time the trichomes mature from clear to milky to colored. Most agree that dark tri's are one of the
best indicators of potency. I harvest when most are milky and some tris have turned amber. Works for me.
Good luck, BigSteve.