Med grower from Mi. leaves curling upwards.

Hello, I'm on my first grow in this room. I'm having issues with some leaves curling upward with the length of the leaf. Not all my plants are doing it just a couple, 1 kali mist and 2 sour diesels. I am using 4 600w cool tubes kept at 8" from canopy. Atmosphere is controlled by Hydrofarm Autopilot, which keeps the temps between 65-88* no co2 yet. I am using General Hydroponics nutes (Flora series performance pack) in soil (Promix BX). PH of soil has been no higher than 6.75. The pics I attached, The one with the L*batts bottle is the kali mist, the other is one of the sour diesels. Oh I have been following the recommended dosages for the nutes and I am thinking on just flushing them.
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Recommended dosages? Recommended by who? List these nutes and amounts you feed and when you started feeding them. Heat stress is seen for sure in those pics. Raise the lights or lower the plants.

hotrodharley said:

Recommended dosages? Recommended by who? List these nutes and amounts you feed and when you started feeding them. Heat stress is seen for sure in those pics. Raise the lights or lower the plants.

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Agreed with heat stress. OP if I where you I would back the lights off to a minimum of 18 inches.

some serious heat stress going on looks like its frying

Def looks like heat. dont make same mistake I did. Lol