Help! I left some perennials in the pots they were purchased in too long and now some are wilted and some are dried up. It happened very fast (no excuse, I know). My question is--should I cut back the obviously dead ones and keep my fingers crossed (and keep them watered), or should I just leave the dead stuff? If they are "just wilted" should I cut off the flowers and leave the leaves?

Would "feeding" them with Miracle Grow help? I'm obviously a little green when it comes to having a green thumb. Suggestions would be appreciated.

Thanks so much!