did you get them off the floor and something under them for drainage?
Those plants look really healthy for the most part.
Not sold on the deficiency, i'd be surprised if it was that.
I bet they'll recover, move them into a diff spot, and let them dry out a lil, obviously not to where they droop or anything but at least to where it's dry to the second knuckle on your finger.
I wouldn't feed them anything other than water though.
that soil has everything you need in it, especially if it's freshly transplanted.
I'd say it's either heat damge (unlikely because it's not at the tops only)
or overwatered, which is what I think it is.
Those plants going from a small container to a large one, sometimes retains too much water underneath, like
@chuck estevez had mentioned.
Smartpots can keep a good amount of water in there, i'd say your problem is there.
Beautiful plants though man, good job!
you are gonna have your hands full come trim-time!