I don’t know what’s wrong

[Abel2fly]

I mixed 2 soils because one held water too much while the other didn’t and I’m not sure if that was the best idea. These seeds started off strong in the soil but are beginning to look sad.

 

[Greenjourneyman]

You need new homes for sure. Not in direct relation to your wilt problem but bigger pots is a must.
looks like you have two things going on, the nitrogen hook. It’s needs feeding, and you have an overwatering issue.
start with the transplant and a feeding when done.