I've got these rust colored spots. They increase in size and quantity until leave turns yellow. I'm growing in perlite, 3 gal buckets hempy style. I have 10 plants, this is the only one with a problem. It's worst on the bottom, top not affected at all.
Ph Ph Ph Water quality is the issue just a guess but your water is a high Ph and you have to bring it down you still have THE alkali in solution even if you drop the Ph and it builds up making the Ph in THE root zone unstable It looks like iron uptake cause the ph is low locking out calcium good old hempy buckets great until water and Ph issues give you Fitz flush with Epson salt then pure PH ADJUSTED WATER THEN GIVE 1/4 STRENGTH NUTRIENTS
Same here Thanks for that King. I find Im suffering from another bout of the same thing. I cut the CaMG from my regiment since Im not using RO water, but that shit is definately taking its toll. Back to using 1ml per Liter it is. Would that also be the reason some leaves feel way too dry and crispy? To add to this, I have something else bugging me. How much Superthrive is too much? I used 1ml per liter last feeding and it seems to have accelerated the symptoms that were just starting to show, those being pretty much the same as the ones showed up above. Peace, JJB
