Doesn't sound like it. You can try transplanting to different soil but you are still asking for a miracle in my opinion. Nuteburned plants are the very hard to fix....once burned that part of the plant is ruined...your only real hope is for new growth to start appearing. I just don't see that happening here because you are halfway through flowering and it most likely is just too much of a major shock on the plant. Don't have anything to lose by trying though.