One of the plants seems to be ready for harvest at...

to be honest depends on your taste. I like mine fully up that means all cloudy no amber and no clears. Some like more amber, amber means oxydised trichomes but that doesnt mean they are wasted, just that they have more CBN in them which gives the "couch lock" effect. this is a nice effect and some like it more. As long as there are no more clear ones you've reached max potency. As you know the potency of the weed comes half from the grow but half from the cure of the weed anyway. as the weed cures many cloudy trichomes will turn amber any way and all the pistils will turn brown. So it's all about the cure and making sure that the trichomes are ready which means as long as they are not clear then they will cure and make THC or CBN and that's a good thing ! hope this helps ! 🚀

I would wait until you start seeing a bit of amber. That will tell you it has hit its peak potency and size. There are likely still clear trichs that can cloud up over the course of the next few days to a week. I'm in the same situation waiting on my autos to finish up. Mine is like 90% cloudy with 10% clear and no amber. So I'm gonna wait for the slightest hint of amber in the actual buds and that should be when there are the most cloudy trichs.