please help asap

Why are just the trim leaves curling? No bugs I've checked well none that I can see ...no spider mites...I have co2 going and the temp stays between 80 and 90 which I heard is ok if you have co 2..but yea I was just wondering why only the trim leaves are warping and not the dan leaves or secondary leaves?

I don't know if it's related to the curling but looks like your using too much N

How would I use less and please explain more I kinda nutrient dumb

I'm no expert just my opinion, but those leaves look weird.. really dark green and plastic looking or something.. that's a to much nitrogen symptom I am pretty sure. Explain how to use less? I can't even think how to explain something that simple.

puffdatchronic said:

I don't know if it's related to the curling but looks like your using too much N

Click to expand...

I concur
It's too hot in there anyways you can tell by the sparse tops; nutes are getting locked in there when water evaporates out of the leaves so fast salts are being left behind.