Here is the full list of all 26 Potato Flowers in Full Bloom achievements.
Defeat the "Hatchet Demon".
Defeat the "Minotaur Warrior".
Defeat the "Lava Crawler".
Defeat the "Basilisk".
Defeat the "Gryphon.
Defeat the "Grim Reaper".
Defeat the "Flame Ifrit".
Defeat the "Werewolf Champion".
Defeat the "Corrupt Imp".
Defeat the "Master Pyromancer".
Defeat the "Night Wind Hippogriff".
Defeat the "Separation Demon".
Defeat the "Frosted Wyvern".
Defeat the "Giant Spider of the Bell Tower".
Defeat the "Stone Golem".
Defeat the "Black Abyss".
Defeat the final formidable enemy in your mission.
See your mission through to the end.
Acquire at least 20 pieces of headgear.
Acquire at least 20 antiques.
Find at least three hidden paths.
Have the leatherworker craft at least four different leather items.
Have the stonemason craft at least four different pieces of jewelry.
Acquire at least 150 different items and register them in your Search Data.
Acquire the Greedy Bag.
Unlock all trophies.