Indoor Nute burn / Wilma issue

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Hi All (first post)

I've got 2x Gold Glue and 2x Chemdogging (mephisto) currently just over 8 weeks from seed, and one of the CD's has developed some yellowing/rust patches on the sugar leaves mostly but also a bit on the upper fans. Does it look like nute burn to you? Anybody have any ideas on how to fix when they're in a Wilma and the other girls are doing fine?

Thanks in advance for any advice! [emoji4][emoji1360]
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:toke:-- wrote it, but forgot to hit Post! :doh:

I see signs of heat/light stress, which also account for the symptoms... how far away are the lights, the type, schedule? T and RH%? .... this can trigger borderline nutrient defc's into showing symptoms, typically micronutes (Fe, Zn, B, Mn, etc.)
 
:toke:-- wrote it, but forgot to hit Post! :doh:

I see signs of heat/light stress, which also account for the symptoms... how far away are the lights, the type, schedule? T and RH%? .... this can trigger borderline nutrient defc's into showing symptoms, typically micronutes (Fe, Zn, B, Mn, etc.)
It's on 400w hps, rh 45%, lights about 12" from canopy

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It's on 400w hps, rh 45%, lights about 12" from canopy

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Schedule is 18/6. The other plants are bang on and this one has colas as wide as my fist in places. Reckon I should lift the lights a little?

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Actually, the temps went over 30 a few times during the heatwave. Maybe that had something to do with it?

A separate question, what do you look for in the plants as a sign to start flushing when growing autos? They finish week 9 on monday and I'm thinking from then?

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