Are they like dead or just reaching towards the sun maybe.
It can be tooo hot or it might be aswell a nute burn.
Pics would make things much more clear .
well they arent dead, they seem healthy except for this the top leaves are curling in, it might be from the heat its been about 80-85 degrees lately, i havent givin them any nutes except some miracle grow and not much at all so idk