[If you don't feel like handling spoilers today, there's an entirely different sign elsewhere in Miracle Country. A much more cutesy looking sign near the Cherry Blossom Café indicates that it's now selling... jam. Lots and lots of jam, because there were so many piles of flower petals that Sakura's put them all to good use.
So feel free to come by and grab a jar... or two, or a dozen. And maybe take a bag of extra petals back home as a souvenir!]