Curling leaves

I'm not sure what is causing the curling leaves in the center plant. I've checked through the other posts and I have read that it could be anything from a nitrogen problem to a humidity problem. Any experts able to weigh in and help me out with what is going on here?

It looks like heat stress. What are your temps?

hornedfrog2000 said:

It looks like heat stress. What are your temps?

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It is about 90F.

too hot bro

hornedfrog2000 said:

too hot bro

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Okay, I just pulled out four-one foot T5's that were in there leaving only two 150 watt HPS's. I also adjusted the fans. Maybe that will cool it down a bit. I hope the two 150 watt HPS will be enough for that space.

I little hydrogen poroxide 2o7ldnt hurt. I had some root rot one time due to poor drainage. Give it a flush. Then let it dry between waterings