5 day old curling at the bottom

Hello everyone. I have a few white widows that are 5 days old and they are curling at the bottom near the soil (like a rattle snake ready to strike), I have 2x 4' flourecent lights with 1 6500k and a 2700k bulb on each side. I keep the light about 6" from the plants; water twice a day, however, i think this is where the problem is. When i get home at night the soil is already dry and this started happening now that temps have reached close to 90's (indoors). today I got a small ac unit where the plants are and i'm keep the room at about 80 degrees.

Do you think that the high temps, dry soil caused this and will the snap back up? any help will be greatly appreciated.

Thanks,
Steve

I think your plants have excess nitrogen,.. Thats usually how the "claw" develops...

Id also make sure your ph is in check.

Add some finely granulated Dolomite lime to your soil, it will keep your ph stable throughout your grow.

Best of luck