Can’t tell what nutrient deficiency this might be. Looks like magnesium on my chart. But internet looks different
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Leaves come and go. How about pics of the full plant?
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What was the last run of PH and PPMs and the medium this plant is growing in Growmie? Most deficienciies are PH related if you’re feeding enough and on a schedule. Looks like a Phosphorus and Calcium deficiency but would like to know the run off numbers and medium type 
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Runoff ph was 6.4 ppm like 2000. In soil
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PH looks great, considerably high on the PPMs unless this medium is strictly organic. Are you using salt based synthetic fertilizer, if so I would water feed a few rounds to get the PPMs down around 1400 or less and feed to maintain. 1000. Your numbers if accurate don’t reflect a deficiency but the leaves do???
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I calibrated my pen last week so I know that’s good. They are high because I transplanted this to fresh soil and haven’t flushed and don’t water until much runoff. I use the fox farm nutrients at like half strength. All my other plant have good ppms and ph with no flushing. Just the soil still was too much.
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With fox farms its best to water till runoff to help with the salt build ups
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I wouldn’t feed the fresh FF medium. It comes preloaded and will feed a healthy plant for 6-8 weeks. I still recommend feeding water only at 6.5 and follow a drench to drought routine. Start feeding the FF nutrients when the runoff gets down around 800-1000 and maintain that with your nutrient input
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Yeah all my other I waited a month. That is the way I water
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I only feed half. Don’t feel a ton of runoff is needed. Basically the same thing. Also that doesn’t answer my question
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Have you done a flush as per the FF schedule? Even feeding half strength, salt still builds up with FF, your numbers look ok, like @OGIncognito said, ppm is high and can cause issues with ph. If your ppm is 2000, his recommended watering is spot on, don’t feed them til PPMs come down under 1000.
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I just did on on this plant. The numbers now are ideal. On the others I waited longer than scheduled just because of light feeding. I figured if I’m feeding half then I can go twice as long without the flush. Two of my plants seem to be struggling really bad with yellow leaves. Both have been flushed and have ideal numbers. 6.3 ph out and 1000ish ppm.
Internet points toward chlorosis. But idk. Seems more that just an end of life fade. The most yellow ones are both 12weeks from seed
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