Im thinking Heat Stress

Whats the temp? are you using nutes? how often do you water? the tips of your leaves look like a ph fluctuation instead of heat stress, but i could be wrong.
 
Temperature soars into the 90's in my closet with the 400w MH system i got going on. I try to leave the door open as much as possible but thats not going to happen during the night so the heat just builds up.

I fertilized them with half strength Miracle Gro stuff last week, no major problems until today.
 
You gotta leave the door open while the light is on... 90f is way too high. You want to get down to 78f. Scorching the during the night will do no good.

You got a fan in there?
 
I have a fan in there but i never turn it on because i think that that will spread more of the heat to the plants. I'm probably wrong though.
 
Rasfuten said:
I have a fan in there but i never turn it on because i think that that will spread more of the heat to the plants. I'm probably wrong though.
Click to expand...

keep the fan on 24/7.

Make sure it is blowing between the tops of the plants and the light. Oscillating is best.

Even when you're flowering, you'll want to keep that fan on 24/7.
 
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