These 2 pics are of one of my girls. The bottom 1/4 of the plant has dying fan leaves and stems and some of the fan leaves a little higher than that have spots on them and a bit of a curl. I have 4 other girls all suffering from the same problems and I'm pretty sure it's not from the light because all of the top colas are perfectly fine. Could it be nute burn? I typically only water with nutrients once every 3 waters. Im 2 1/2 weeks into flowering. Only my first grow and I'm lost on this one