Weird stains (burn?) right before harvest time. Pls help!

[Shargo]

This is a Northern Lights feminized, at 10 weeks of flowering time.

Problems have started a few days ago. You can see in the pics that some sugar leaves at the top, but also some fan leaves have started showing weird brown-yellow crispy stains. Best seen in pics 10-12 below.

Also, it has become significantly hotter the last week or so, temps in the grow box are around 26C (79F) at dark and up to 34C (93F) during light time.
So I'm not sure whether these are burn marks (it gets quite hot up there near the bulbs) or some other thing. Would love to get your opinions.

Should I cut her down or let her be for another week or so, taking the chance with this weird thing not destroying the plant?


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[nick88]

This is a Northern Lights feminized, at 10 weeks of flowering time.

Problems have started a few days ago. You can see in the pics that some sugar leaves at the top, but also some fan leaves have started showing weird brown-yellow crispy stains. Best seen in pics 10-12 below.

Also, it has become significantly hotter the last week or so, temps in the grow box are around 26C (79F) at dark and up to 34C (93F) during light time.
So I'm not sure whether these are burn marks (it gets quite hot up there near the bulbs) or some other thing. Would love to get your opinions.

Should I cut her down or let her be for another week or so, taking the chance with this weird thing not destroying the plant?


ThanksView attachment 2195615View attachment 2195616View attachment 2195617View attachment 2195618View attachment 2195620View attachment 2195621View attachment 2195622View attachment 2195623View attachment 2195624View attachment 2195625View attachment 2195626View attachment 2195627View attachment 2195628View attachment 2195629View attachment 2195630

Wow, 10 wks flower withNL.. That's a pure indica strain, should have finished out in 8or9 wks.. What seed bank?

 

[nick88]

If you can't get your temps below 90's, you may as well chop before you do more damage than good.. From the looks of them you should get some pretty decent smoke

 

[Shargo]

The seed bank is Nirvana.
I guess the long time is because of the relatively low amount of light. It's only a total of 100W.

 

[Shargo]

If you can't get your temps below 90's, you may as well chop before you do more damage than good.. From the looks of them you should get some pretty decent smoke

That's what I was also thinking. thanks.
Would love to get more opinios... Any ideas on the cause for the stains/burns? Do you really think it's the heat?

 

[scroglodyte]

almost looks to be re-vegging. any light leaks?
and yeah........93F.......way too hot without CO2.

 

[lahadaextranjera]

10 weeks on 12:12 ??? Indica dom plant? Cut soon if you've flushed (7-10 days water) already and I agree abt the re-vegging from those small rounded leaves at the top.
I just re-vegged in the garden on purpose and it took on that form. Must be small light leak. Is it on all sides of the grow room?

 

[nick88]

10 weeks on 12:12 ??? Indica dom plant? Cut soon if you've flushed (7-10 days water) already and I agree abt the re-vegging from those small rounded leaves at the top.
I just re-vegged in the garden on purpose and it took on that form. Must be small light leak. Is it on all sides of the grow room?

Thought the same thing at first, but then noticed all the new white hairs