How long til harvest?

I see you have a lot of white pistils, I would say minimum 2-3 weeks for what I see in this picture, some of the plants mature early than others even they are the same strain. You can get a magnified to check the trichomes, minimum you should get 80% cloudy and after that is your preference some people like 40% amber 60% cloudy, it all depends the effect you are looking for, for myself I like more sedative effect because is for sleep so I wait a bit longer around 50 to 60% amber. This is my opinion there is not right or wrong.