Sure looks healthy and robust--like a photo. Always a problem with the bottoms not getting light with LEDs. Nothing much produced on lower stem.
One could harvest anytime, but, you will want to wait for some more cloudiness and a touch of amber--could be any day. The way it is going the amber may take a long time. Unless you have the patience.
I see you have another beast next to it.
Will be waiting for your harvest and smoke report.
BTY--I think you need to bag and sell your soil mix. You have a secret ingredient in there.