OH NO! I always get a little squirrely when it's unseasonably warm for precisely that reason, there always seems to be ah ha late snow storm or freeze that wipes out a bunch of beautiful blooms and blossoms. Ugh!
But like you said, they'll be back Well, at least the perennials....
I wish I could just give you a Hollyhock, they are so much fun to take like 300 pictures of, and you take the most beautiful plant pics, I know you'd get the best shots.