Haze fever

aftermath of heavy levels of nitrogen and potash , i personally think.. give her magnesium. think your current feed levels are good, no burns at all, just previuosly they were on heavy diet and its hungover from that ;)

Either a pigment mutation or a mag deficiency more than likely.( if your environment is good) Try foliar spray twice a week with Epsom salt and water( one tablespoon per gallon) and I would up your nitrogen a bit to help with uptake.

Developing magnesium deficiency.