curling leaves

what do u guys think nute burn heat burn? i dunno why they are curling like that.

I've noticed that inward upward curl on the edges is from heat. Try and circulate the air more towards the tops where the light is more prone to keep hot air.

My guess heat stress, what nutes have you given them, and at what strength?

use organic nutes

yo, im havin a similar case with my plant, tho its less severe. my plants are still vegging too. i also noticed the stems an branches purpling, what could this be? i keep the temp at 73 so i dont think its that. please someone get back at me