One of these things is not like the others

Usually we have a couple of flower pots that my husband buys flowers and plants them.  One for the back porch and one for the front.  This year he only did one for the back.  He  bought 4 purple petunias.  At first I thought one flower that was coming up was a freak.  Then I realized it wasn't.  There must have been a red one mixed in with the purple.    They look kind of battered but  this was taken after the big storm.