Gs_13

What @BlackCousin said. It happens when there is watering irregularity between feedings. Only flush if your plants need to be flushed,you get that feeling usually.When you give less amount of water that is not enough for them to absorb nutrients,leaves become this.nutrient burn signs show up and leaves die eventually.Plant trying to drink what is left on its leaves.But no problem for now as you are very close to harvest.Keep giving nutrients but at lower level.If you want to flush before harvest,my advice is flush with enough amounts of water until you see more clear runoff water.Then after that,feed the plant at a manageable amount.No serious problem at all.they look great.fading looks good.not all leaves are dead.I've seen worse.wish you good harvest.