Break out the scope and look for the mushroom tops on the triches that is how you know she is done. If they are creamy white, sort of milky, then they are probably close to done. Letting them get to amber means that they are passing their point of peak potency. Some, however, believe that leaving them go till they are amber will produce a more of an couch lock high and cutting them early will produce more of a sativa type high. I cut my when they are all milky white and some have started to turn amber this is my peak potency window... Great looking plants!