It might be the quality of ur pics but everything looks just fine.
The fan leaves look healthy to me, have you checked ur plants at different times of the day? Outdoor plants look all wilted and droop in their dark period overnight but perk up again as soon as the sun comes out.
Some of my plants' growth shutes have red/yellow stripes in them, usually the main on the main cola, but i think that just comes with using the sun. They will grow into normal green leaves even if they start somewhere between red/yellow/green.
Overwatering, the fan leaves would be swollen and drooping during daylight.
Too Much Nutrient, the fan leaves would have burnt tips and be discolored.
I don't see either in your pics.
But when adding nutes you should never spray on the plant leaves directly, i hope that's not what happened.
Stems wilting.. could be an insect problem, with outdoors its usually an insect problem because with good sun and proper watering weed will usually take care of itself with minimal effort on your part.