In my experience, I hang them until the stems crackle and crunch when bent, cut the buds from the stem and then paper bag them. Keep the bag mostly closed for a few days to a week and then into plastic or glass. A hygrometer at this point is good and then open the jars a time or two daily until RH gets down where you want it.
No idea why I typed all that, really. The answer is, when the stems crackle, you’re ready for the next step.