what would you say cause this?

A grow i've got in a 2x2 inclosure lined with mylar, SCROG of course. Im wondering what you all may think the problem is. I feel that it was caused by heat and my led maybe being to close? Its not a ventalated space and sometimes reaches 80-90 degrees.

are you talking about the nutrient burn on the leaves?

Most likely looks like Overfeeding or possibly High temps but Damn dood.. thats a good show there!

def overfeeding friend. maybe a little heat stress as well but def nute burn.

Nice nugs! It does look like temps may be warm and some Over feed but dooood all in all beautiful! Just readjust a couple things next run and see how she operates.

Too much nitrogen(overfert)/ which is locking out potassium(leaves curl up)^^.............flush/flush

Thanks for the input everyone. what do you all recommend to moniter nute levels?

to monitor nute levels you would need a tds meter but i think you already knew this, and you were really asking a good brand of tds meter someone with a little more knowledge on this subject to help you out. as for your problem yes they do look nute burnt but the real worry to me is you said none ventilated so you do not have fresh air coming in? i mean they look great! but a plant can use up the 350ppms of co2 in the air very quickly do you keep a door open? have you ever had mold issue? i am very interested in that. man they look great, i would flush and get ready to harvest.

bigb18 said:

View attachment 2414922 A grow i've got in a 2x2 inclosure lined with mylar, SCROG of course. Im wondering what you all may think the problem is. I feel that it was caused by heat and my led maybe being to close? Its not a ventalated space and sometimes reaches 80-90 degrees.

Click to expand...

Magnesium deficiency. Give them some epsom salts in their water. Are you doing hydroponics? If so give them Epsom salts at 20 ppm twice a week. You could also get some cal mag, and give it to them 80 ppm once a week. This is definately magnesium deficiency which is normal in late budding in hydroponics.

Yes i leave the door open and have a small fan blowing in the enclosure. no venting as in no ventalation system to keep cool. i have no mold problems, humidity the highest i have ever seen was about 70% i live in a rather dry area. The temps on the other hand hitting low to mid 90's was a concern. i think the new setup and new led light made me at first believe it was a heat or too much light issue. i looked up deficiencies about a week later and noticed simular sympotms to 2 or 3 deficiencies then over fed i believe...

I got pretty good color taste and aroma out of her. i also got a dry weight of 6.25oz off of the one plant not bad for cfl's and a 100w led but maybe im wrong.