Best way to tell is by using a Loupe or pocket microscope that can see 60 to 100x, Look for Cloudy and Amber Tricomes
Visually a plant can look finished but still be premature under a microscope
Plant looks to just be filling in on the flower and will continue to do so, Also Do not feed them anymore as they have yet to start to fade off by sucking up and using all the nutrients they have stored