A: This sounds like root rot, unfortunately, which would indeed mean that those individual plants are a lost cause. Ideally, you’re monitoring plants periodically for watering needs before wilting ever happens, but everyone has been caught off guard by a wilting plant now and then. Root rot is too advanced at that point.) Nothing can cure root rot once it sets in. Unfortunately, a wide array of popular annuals are vulnerable to root rot if kept too wet, such as flowering vinca, petunia and their calibrachoa cousins, fuchsia, marigold, pansies, dianthus (carnations) and celosia.
