Usually right after the initial dry. My process is usually cut the entire plant down and hang upside down for a couple days then remove all water and secondary leaves. Leave hanging for a few days checking humidity levels. Once I'm close to branch snap I'll break them down into individual branches and let them dry for a few days more. Once I get a decent snap out of the branches I remove the flowers from the branches and put them on the net if they need additional drying. From there they go into jars and I burp until the chlorophyl smell goes away and the terps start to really come through.
I just harvested a few weeks ago and just now I'm starting to smell the terps coming to the front and the green and hayish smell going away.
GF also had a lightbulb moment smoking yesterday. She told me that she was starting to see why I wanted to wait and cure the flowers in the jars instead of just smoking them because they're dry. She's also starting to be able to notice the terps and the difference in the high than when she was smoking them just off the vine so to speak.