Plants lower leaves are dieing

I cant figure out what this is, they have just recently been transplanted temps can get as high as 90

Why does the temp rise so high in there. You got to get that down a few degree's man. You want 72-76 for best results. Need more ventalation?? At first glance that looks like a burn of some sort but without seeing more of plant this could be to close to light but its prob. Nute burn so back down just a little bit bro

im having a hard time keeping the 600 watt cool in a grow closet

90's is too hot.The plants might survive but will grow at a slower rate because the heat will stress them out and leaves will curl in attempts to cool down.Leafs will start to crust up and die.Nutrient deficiency can also cause foliage to diei.I think the cause might be from heat and stress from transplanting together.Get your temps lower so you gurls can be comfy

Try to vent your hood I was hAving the same prob....... I vented my hood and switch my light cycle so lights on at night now my gurls are looking great.......For plants to grow vigorously you(MotherNature) must make them as happy as possible.The least stress possible....

Get you at least a 400-500 cfm fan with a 6" flange on it. Like a valueline 6" inline fan on ebay is like 109 bucks and it will do the trick for those temps. Also try and lower the air coming into the room a few degree. I try to keep my temps going into the room at 70 degree and it works great