Heat stress? Nute burn?

Hello all!
This is my first female plant flowering (like 1.5 weeks). I was happy because today the sun came out like it does here in Brazil for the first time since this plant germinated. After some hours of sun i noticed some brown spots on the older leaves that went bigger and bigger during the day, at the final of the day, 3 leaves was like the first pic shows.
Im using a spanish nute for cannabis, and giving low dosages cause i think my soil is too strong.
Im pretty confused cause it looks more for me like a nute burn, maybe the sun just speed up the symptoms?
Im also uploading a second pic that shows the whole plant just at the begging of the day, notice the leaf near the center starting to turn brown. (And my bizzarre LST :p )

Thx in advance and sry about my poor english :stoned:

You're saying that all happened in one day? I don't know if nute burn would manifest that fast. Maybe the sunlight was too intense/hot? Otherwise, I don't know.

It looks like it could be a nut thing but like Perp said "that happened in one day?". I don't think the sun can even do that. It might be a late notice on a lack of N, or it might be catching a reflection off of something. check for hot spots.

thx for the answers guys, and yes that all in one day.. just a few leaves, the older ones that were exposed to direct sunlight, the younger leaves still ok.
i still wonder if the sun light and the hotness r just speedin up the overfert symptoms, wht u guys think?
btw, today i made a 15min flush at the morning and im avoidin direct sunlight.

Thx, any help is welcome.

give us an updated pic so we can check it's progress.

i noticed it is out side that happend to me 3 years ago it was doing my head in cos i did'nt know what it was then i caught my dog pissing up it the piss burns it straight away, just an idea

Well today i took off the worst leaves before the flush. Now theres one leaf, that is the worst one, that im checkin every 1/2 hour and looks like the symptoms progress has slowed or stopped. Ill post a pic of this leaf and will post it again in some hours.
Haze, thx for the idea but my dog has no access to the plant.

thx again

refrain from cutting of leaves, if they are not being used by the plant they will fall off, any cutting with stunt the plant more, it looks like a def. not a burn

Quote:

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Originally Posted by JackdaWack

refrain from cutting of leaves, if they are not being used by the plant they will fall off, any cutting with stunt the plant more, it looks like a def. not a burn

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thx for the tips Jack, ill avoid cutting leaves. What def do u think it could be? cause today i started to think that its maybe a Mg def., lookin at some "sick plant guides".
The strange thing is that after the flush, looks like the symptoms had slowed down (but i cutted off the worst leaves).
I have both dolomite lime and epson salt, wich one is the best to use? Anyway i think ill wait some more days and look how the plant will respond to the flush.

Thx again for ur time guys
End Prohibition! :rasta:

Erm sry for the double post but looks like i cant edit.
I want to add this pic. Note the green veins while the rest of the leaf is losing color, thats pretty much a Mg def symptom right?
Oh god im so confused hahah, this is my first flowering female plant, im so anxious, sry for all the questions.

:pimp:

hmmm.. triple post now.. :wtf:
I got updates... looks like the plant liked the flush.. the symptoms has slowed down a lot, but the older leaves still slowly dying. Im sendin a pic of the same leaf two days ago and today, and a pic of the whole plant today.
The plant is going fine, its growin fast, flowering going on, its not a big problem rly, i just need some opinions since theres no growers around here at my place to talk about. :rastasmoke:

Thx all.