10 weeks of Vegetative state, issue with fan leaves for the past 5 weeks
Currently in it’s first week of flowering 11/6/2019
I’ve been stressing about this and I just don’t know how to fix it.
All new fan leaves start yellowing and then develop brown spots and generally speaking look very unhealthy. I’ve been pruning them off but it’s unsustainable. Lower leaves appear to be more affected. The entire plant went through a yellowing phase 3-4 weeks ago. It looks healthy but there was a very noticeable change in colour (could be strain related but thought it could be relevant). Recently I have been finding blackened tips on some of the lower leaves as well.
My guesses: Based on research, Zinc seems to be a likely culprit. But the symptoms are so similar for so many different issues I"m afraid of misdiagnosing. I also read zinc toxicity is very real and that I could kill my plant. ANY help would be GREATLY appreciated.
Medium: Soil (pro mix premium all purpose soil)
pH: 6.05 (I have a cheap amazon reader, it could be slightly off)
Water pH: Tap water is around 7.5-7.9 here (using the same reader)
Strain: Amnesia Haze
Light: 600w HPS approx 35" above plant
Temperature: 80F during 12 hours on, 72F 12 hours off
5 Gallon fabric pot