I took a look at the photos from the first week and I am of the opinion that you "registered" flowering 2 weeks later than flowering itself. From the photos of the first bloom, the plant looks like it is already about 2 weeks of flowering, so you are probably around the 7th week of flowering in total. They are just my opinions. I would start the flush. If those are the external parts of the plant already seem to be at least 30/40% of their ripeness, and as
@sir_isO pointed out, the internal and unexposed parts ripen more slowly, so they could be at 20% of ripeness (I repeat, personal opinions , deny me as well 😆). Finally, I would start the flush, my "recipe" in this regard is to give the usual amount of water you have always given, without fertilizers, plus 10%, always clean water. I hope I have been helpful in some way 😁🤘🦄