I think the moon petal is also extremely rare. The rock drops the moon petal but It has to be super or ultra to order to get that petal. But if your rich, you can buy it in the shop.
Ahhh you seem to forget whats TRULY the rarest petal Its a dev exclusive petal and is also beyond Super rarity and is a version of Dahlia and not possible to get with Duplicator talent.. Meet the *Q U I N T I P L E D A H L I A* oh yea i also forget Unique basic, it used to be 1 in 100k before getting removed but now its 1 in infinity. infinity multiplied by 100k is 100,000 infinities so its the true rarest petal in the game, being rarer than Quintiple dahlia!
Okay, 1) Yggdrassil does not exist in 'rare' rarity, as shown in the image. Same for compass. It's an image tho so I don't mind too much. 2) If we are counting rarities, then super square is the hardest (actually impossible) petal to get, since you need to find probably trillions of squares in order to craft a super. 3) That old rose doesn't exist, and if you want the developer to give it to you, then all removed petals are rare. 4) How are you supposed to play legacy florr? And anyway we are talking bout rarest petals in current florr. 5) Not counting square, rarest petal to obtain (without buying it) is moon. Thank you!
Ah yes 5⁷ I was thinking way too much about it lol. But still now "only" haha i mean 78k commons is hard to get already, and that too dropped by the most rarest mob in the game