Board Thread:Plants vs. Zombies 2/@comment-28896136-20160701095544/@comment-24275721-20160701155447

The costumes you get from the pinatas are random. It's not like where you are 100% guaranteed to get a Summer Nights costume during Summer Nights event. The only way is to make sure you already have all costumes for all plants so that your chances of getting the newer costumes are relatively higher.

That's not a problem, that's intended game design.