Heat Stress or Nutrient Deficiency??

Yes I had my ac kick the bucket on me and I was not able to fix the issue yet and now I am having problems with my plants. I am using house and garden and following the feed chart they give. I am having the same issue in my flower room too and it all started pretty much when it started getting real warm in the rooms. I got a new ac for my flower room but not vented my veg room yet.

nutrient stress is the cause which is leading to other issues.

flush with water, lemon and baking soda. i usually do 32 oz of water, half a lemon squeezed and thrown in there, and a teaspoon of baking soda. after that let the soil dry out for 2-3 days before watering again! it may take even longer if the roots arent working right! make sure to soak the soil, then let it dry out