Can't tell if this is heat or ph problem

Can't tell if this is either or

What's your grow area temp? Looks to me as ph. Check the runoff with your ph meter. I shoot for between 5.8-6.2 for my soil with 6 being my goal. Nute deficiencies can arise from too low or too high ph, so a lot of probs can usually be fixed with ph adjustment, so rule that out before additional nutes.

It's going to be hard for anyone to give you a reasonable answer if you're not willing to share your details. It we're making guesses, you're short on K and it appears maybe you have too much N going on. All as a result of pH; maybe...maybe not. Pics under white light and grow details would help. Good luck