High Green4H, Roughly 2 weeks but you need to look at the trichomes with a pocket microscope to tell the ideal moment for harvest. The trichomes are the only exact way to tell when a plant is at full potency. You can buy a juwelry loupe or a pocket microscope x60 for around 10 dollars. They are also really handy for pest identification for future grows. And you will gain a lot of quality buds for this small investment.
The plants look great and again around 2 weeks but to be exact buy a pocket microscope x60
Enjoy your harvest buddy!