Since it looks more and more like there is an actual counter going on instead of really collecting "all" herbs, i was wondering, could it be, that you have to have that actual Number (191 for Bailu iirc) of herbs in your inventory? Right now i am on NG+ and have 105 herbs in total (No Niaowu herb, i didn't collect any on my original run), but i sold 78 herbs near the end of Niaowu, and i am pretty sure that i sold more than 8 herbs way before in Bailu (several high price sets actually) So right now, if combined, i really should have popped that trophy already, yet it looks like i have to collect another 86 herbs in Bailu, which seems to be impossible (I just spent several ingame days to look at every corner for herbs, but there are none)
So those who got the Bailu Herb Trophy, how many herbs where in your inventory at the time?