I hate to be contradictory here, but the problem is low fert, not overfert. According to your info, you're feeding fert about every 8-12 days which may not be enough depending on how much you're giving. Also I don't think the 2 of 2-3-1 is enough at this stage of growth. I think I'd try giving a double dose at next water of that fert. Adding ferts during a grow makes for alot of guessing that doesn't need to happen. Powder ferts that come in a box are the answer.
polishpollack Reviewed by polishpollack on . Does this look like calcium deficiency or maybe boron deficiency? Pics. I noticed these spots on my leaves today, it must have developed in the last 24 hrs. I actually had this same problem on my last grow and it seemed to go away once I started using flowering nutes but I am nowhere near inducing flowering yet. The only thing I have been feeding it is Neptunes Harvest (2-3-1) every second or third watering. The strain is nirvana northern light. Lighting is 1 90 watt led + 2x42 watt cfl for some side lighting. Temperature is usually around 76 degrees. Soil is Rating: 5