- Guys im back for more help my plants were doing great now im having some issues with some of them. I have 4 auto's Number 1, Blue Mystic, biodiesel mass, red dwarf, and 4 Regs. 2 Rocklock and 2 afghan Kush. I have done a ton of research about these brown spots and yellowing. I cant pinpoint the problem, so i turn to you guys for help. They were doing great and then the spots started. The closest things i have found that compare to my issue is Cal-mag def. or Nute burn. The issue with that is My Autos are getting Earth Juice bloom nutes at half strength and my regs are getting Earth Juice veg nutes at half strength. I have been using rain water when i can and PH'd tap water when i have too. (6.5) I havnt tested my run off though. Most of my plants are doing this except the 2 i moved outside this week. Any ideas would be great.