Board Thread:Plants vs. Zombies 2: It's About Time/@comment-25154254-20150403114523/@comment-24760547-20150407222546

Hmmm, apparantly the Endless Zone glitch, (the one where the cards never show up) is gone once you have chosen every plant card there is. So as long as you have chosen all the plant cards for that EZ, the cards decide to return, and you can get free Power Ups again.