I just noticed this Tangiedos clone was getting some brown/bronze spots. I have an inkling it is a nutrient deficiency. I switched my plants to flower and we are on day 4. I’m hesitant to add nutrients since they were transplanted 8 days ago from 1.7 g to 5 g using FFOF, which I know runs hot. They’ve had a rough start to flower as well. I switched to 400 w hps from CFL and after battling temps, I caved and bought a yield master air cooled hood and temps have been great for 24 hours. This is the only leave on the plant with this and the other plants look totally fine. I just hope to nip this in the butt if it is something I need to adjust.
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Umm.da fuq?.
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if all other leaves look good cut it off and move on
looks like a water spot
but who know sorry 
dequilo
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I do have hard water in my humidifier. But it usually shows up on leaves as white. This is the first time I’ve seen it show up as a brown “burnt” spot.
a water drop and HID light and you get lensing
a guess 
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Is that actually the color?
It’s rather dark, I’d suspect nitrogen toxicity (I’ve done that) if the color is correct.
Cheers
G
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I haven’t added any nutrients. You think the Fox Farm Ocean Forest would be too hot still?
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so have I but the green is almost black at that point ?
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It’s not optimal but it’s not going to cause serious problems.
It varies with the cultivar - a lot!
Right now, in the same soil, I have a CBD sativa that’s showing mild toxicity and a couple others telling me they are hungry… One size fits all does not exist. 
{edit} I agree, those spots look like water damage, but keep an eye on them just in case they are growing.
Cheers
G
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That does look like early nitrogen toxicity to me, having the same issue as we speak, uppotted to a 1:3 perlite : FFOF, one of my BOG LSD, flushed 2 days before transplant, may have gone heavy on supplemental nutes prior to transplant( pre-flushed)…pics shortly. New growth is good today, but still dark lower with similar spots…
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Fortunately my other two clones are doing great in the soil. It should run out of nutrients in the next week or two and hopefully I can give it some big bloom!
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Have you tried Happy Frog? I’m thinking of moving to that after I run out of OF. It seems like this stuff is potent!
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My up-pot was from a perlite: Happy Frog 1:4 mix it went into from a rapid-rooter start, was a bit rootbound in its’ Solo pre transplant. Haven’t been back in the game long after a long absence. My eyes and gut tell me a Happy Frog base with some perlite and supplemental nutes would be preferable, in my conditions, at this point but will wait till it’s finished before passing judgement on its’ totality.
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Have 4 Maui-Wowie (CB) fem, 3 other BOG LSD, and 2 BOG Sour Blutooth females showing no ill effects from the same regime…
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