Trimming foliage on transplants should reduce stress by cutting the amount of water needed for transpiration. If the leaves are wilting they are not photosynthesizing in any case because the stomata are closed.
I would not fertilize a struggling plant because that can draw water away from it if one isn't careful. Best to wait until it has re-established itself. (Of course something like alfalfa pellets would take a while to kick in, I'm thinking more of an immediately available fertilizer).
