We also took the flower route for bounty! I was totally stumped initially, then went back and thought I understood, then got stuck on F and no hint was helping. This is clever, but I might not be smart enough to understand.
I would maybe consider changing the trowel to have that plant selected. I found it a little annoying to use the trowel to pick it up, then have to click the flower to place it again. I want to just hold it in my hands :)