Tried PMing you but your inbox is full
Congrats on the Flower Trophy - I'm pretty sure the Collectibles for it drop from Wall Decos and Wallpaper purchases. The Game Guide has a list if you wanted to know for certain.
Achievement - instead of starting a pointless thread for all my little achievements that no 1 cares for - I will post them on here, where I can view them at any given time, and be happy about them.
Achievement number 1 (first post)
I just got my very 1st "Flower Trophy" I don't know how or why, but I was just scrolling through my collectibles list to see how many things I had to trade for goal parts, and I seen this! A completed list of the "Floral Bouquet"