Board Thread:Plants vs. Zombies 2/@comment-27790153-20160323102449/@comment-24275721-20160323104511

This is because of a bug in the recent version. Whenever a Premium plant is on sale, it will be locked for the duration of the offer. That's what happening to you. Don't waste any more gems (if you already have done so). The plants will return after the sale is over (which is 14 days) or PopCap fixes it before that.