Help with leaf color

[mattx]

I will start by acknowledging this might be a newby question - I have had 3 successful grows, but never seen anything like this before.
I am growing Bruce Banner and Gold Leaf from 420 in a 4 x 4 tent under Galaxyhydro lights.
Growing in Foxfarm Happy Frog soil using FF nutes (dirty dozen).
Temp is ~74 all the time and humidity right around 50%
The plants are the happiest I have ever seen the tops of any of my plants. Not one discolored leaf.
I am at week 8 and just about to go to flower 12/12.
I noticed the following on my bottom fan leaves. I have seen this before in flower, but have only grown GG4, and have never seen this in veg. so maybe these are different. I am also colorblind, so assessing these by online guides is always a challenge.
Anway, looking for feedback, is this ok for my bottom few fan leaves, or should I be worried as I head into flower?
Posting pics of the crowns and fan leaves so you can see it's restricted to the bottom.

 

[Pbass]

Hiya mattx does the FF dirty dozen include cal/mag? I've seen that pattern before it's probably gonna progress to more rusty and crusty on those affected leaves, but my girls tend to grow right by it, albiet those that show it tend to be a bit finicky throughout the grow.

I'd guess it's the start of a tad of deficiency or lockout...which I attributed mine to a bit high pH (my water is 7.5, I now treat it with vinegar to bring it to about 6.5, which brings my soil still a tad hot at just over 7), lack of cal mag and a mild case of chronic overwatering. Do you know what your soil pH is?

 

[Grandma Weedstein]

Hiya mattx does the FF dirty dozen include cal/mag? I've seen that pattern before it's probably gonna progress to more rusty and crusty on those affected leaves, but my girls tend to grow right by it, albiet those that show it tend to be a bit finicky throughout the grow.

I'd guess it's the start of a tad of deficiency or lockout...which I attributed mine to a bit high pH (my water is 7.5, I now treat it with vinegar to bring it to about 6.5, which brings my soil still a tad hot at just over 7), lack of cal mag and a mild case of chronic overwatering. Do you know what your soil pH is?

Could it be the case that the fans are just old and/or light burned? I’m probably too laissez faire about stuff like this, but if it’s just bottom fan leaves, I don’t stress if they look rough. Maybe I’m wrong about this. I just figure that not every leaf on every plant in my yard looks pristinely perfect, so I don’t see why my cannabis would be any different. Then again, I’m not exactly a top shelf caliber grower, LOL. More like 50s-era High Times, but I aspire to be 80s-era eventually.