In my case it’s not flowers but dolls, bird heads, pony tails, and the back of heads which are coming up as false positives. So in People view I’m clicking on the first picture, hold shift and click on the last one in a sequence then press SHIFT-BACKSPACE for “Ignore this face suggestion”. By slowly eliminating these, I’m hoping they won’t be used again by the face recognition algorithms. Try doing a mass “Ignore this face suggestion” to see if you start seeing improvements
