Hey Growmie ...
From the pics, you can't really tell but a sure way to know is to Use the Pistil Method to check whether its harvesting time. Make sure that at least 70% of the pistils have turned amber before harvesting so you can get optimal THC levels and you also want to flush the plant with pure ph balanced water for at least a week to remove the excess nutrients from the soil.
Hopefully, this was helpful and remember ..."Happy Growing" and "Free your mind one puff at a time"
Mr_Weeds_Autos.