Sunscald?

I agree with above. first, never use garden or top soil in a container. Second, with a product like Miracle gro, I am sure it already had a good dose of nutrients built into it and putting in more is not good. Third, and this is probably the biggest cause of your problems is moving them from a protected/filtered environment to the outdoors without "hardening" them off first. I would get them back in the green house and hope they rebound. Then, once they recover, slowly introduce them to the wind, unfiltered sun and all the other outside elements.

It is up to you, but you might want to re-transplant them into a mix designed for containers. Adding some Perlite or similar is a good idea with Peat based mixes as well.

Oh, and one other thing. That blue and white container in the photo looks a lot like RoundUp. If you get annnnyyyy of that on your peppers, it will wreck havoc. Just a slight bit of overspray or a drip here or there is going to be disasterous. Get that stuff away from all of your desired plants.

I just moved them over from where I had them originally. My greenhouse is too small to put them back in they were originally in solo cups. So do I put it back in a solo cup or repot it. I got Peat Moss today.

Ahhh, you might have to. I don't know where i would go here. i would hate to see you put them in a fresh 5 gallon bucket of mix and have them not make it. But putting them back in cups probably isn't ideal either. You would just have to replant them again soon. I guess it is up to you. Maybe try the cups for the bad looking ones and 5 gallon pails for the others. Then keep them in the shade for a few days until they look healthy and start putting them where they get more and more sun each day. Wind is also a factor.

Thank you