I have 6 plants all doing very well EXCEPT 1. They were all planted at the same time and nothing different has been done to this one. It is a OG Kush. It has takes about 8 days to turn into this death on a stick! I had it happen to 1 Purple Nice Guy in my last crop also. Help what is happening???? I flushed the soil completely on day 2, fetilized on day 4, and watered lightly on day 7. The leaves are all curled and have turned crispy over the past 2 days. Even the new growth is beginning to turn. Please help!!