Spots spreading on leaves Day 20

Here we are day 25 now and I'm having some lower leaves turn yellow. I find it hard to believe it's nitrogen deficiency unless the ph issues blocked out nutrients? Since correcting PH they have only had 1 watering so far. Thoughts?

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Here we are day 25 now and I'm having some lower leaves turn yellow. I find it hard to believe it's nitrogen deficiency unless the ph issues blocked out nutrients? Since correcting PH they have only had 1 watering so far. Thoughts?

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Those lowers always yellow and die off 1st!
 
Not feeding anything yet. Can I topdress with more ffof and see if that helps?
 
I had the same issue with FFOF, I found out it’s hot for the plants as it is. A few of my seedlings had to go because they got burned, of course not all. They’re striving now but I’m going to go with Pro Mix HPCC for my next run, here’s how they’re doing now with some at day 42 and some of them behind.

(You should check the PPMs on your run off to see if it’s really high. That’s what I did and determined it was hot)

I too am using FFoF currently at day 71 post sprout. I have been battling issues for what seems like the last 2 weeks now (appears to be nutrient lockout and I have since acquired a BlueLab pH pen and TDS/ppm pen. I found out I was watering with quite low pH (5-5.7) for these last couple weeks when the problem started to pop up.

So I decided to run plain pH’d (6.4-6.7) RO until ~20% runoff and measured pH and PPM of each of my plants (both have very similar issues by looking at them). pH came out at 6.4 in both runoffs with a ppm of ~740 (ppm500). This is practically telling me nutrient lockout has occurred correct? Since input source was measured at ppm (120ish).

Or maybe the soil was so hot I didn’t need to be adding Floranova Bloom at all to these plants yet? Also, I’m quite confident I fed it too much nutes too often in the last few weeks and here I am. So what did you do to rectify your FFoF soil once you found out your runoff ppm was too high @Gutlez
 
I too am using FFoF currently at day 71 post sprout. I have been battling issues for what seems like the last 2 weeks now (appears to be nutrient lockout and I have since acquired a BlueLab pH pen and TDS/ppm pen. I found out I was watering with quite low pH (5-5.7) for these last couple weeks when the problem started to pop up.

So I decided to run plain pH’d (6.4-6.7) RO until ~20% runoff and measured pH and PPM of each of my plants (both have very similar issues by looking at them). pH came out at 6.4 in both runoffs with a ppm of ~740 (ppm500). This is practically telling me nutrient lockout has occurred correct? Since input source was measured at ppm (120ish).

Or maybe the soil was so hot I didn’t need to be adding Floranova Bloom at all to these plants yet? Also, I’m quite confident I fed it too much nutes too often in the last few weeks and here I am. So what did you do to rectify your FFoF soil once you found out your runoff ppm was too high @Gutlez
Some of my girls were slowing down in growth and 2 were really striving. I couldn’t do much so I just gave them water as their feedings with 6.4 pH until the PPMs dropped a bit. After that I just prayed and started my regular feeding schedule really late unfortunately but they are striving now. But one of them has started showing some issues, a bit of some rust/orange. Currently they’re at day 52 from seed
 

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I agree with other comments: In my view, there should be no expectations that the very lowest, oldest fan leaves will remain healthy. They often, if not usually, die sooner or later after turning yellow (giving up their nutrient content to the plant in this process).

The leaves that die are usually the same ones you will soon enough or maybe already should have been removed (defoliated), whether because they get too little light and/or to allow better ventilation under the plant. I'd just pull off the shriveled leaves when they can be pulled off with almost not effort; and not consider this a problem.
 
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