Wait...What? said:A plant with wet feet will most certainly have lower leaves that yellow and wither, if left wet long enough.
Problems that happen to the oldest leaves first almost always tend to be root-related.
In hydro, the magic bullet for any given problem is to drain the res and mix nutrients at a lower strength. In soil, the magic bullet is to pot up. Transplant into a larger container with a fresh mix.
The plants in the pic should not have been fed any nutrients yet. They're not large enough to need it. The original poster also does not mention the pH or strength of the soil[less] mix used. Babies don't want much of ANYTHING, least of all strong fertilizers.
Pot up and watch them recover.