I think I will start by cutting the amount of water I give them by half. I don't think its the neptunes harvest, I have used it many times with no problems, it isn't even that strong. If I were over watering can that actually cause those spots? Is it from the stress or something.

Thanks for your help.
rossee Reviewed by rossee 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