It can take some time to come back from stress but my guess is. The 400 only 9 inches should be more like 18 to 24 and 15 humidity is low. Good for flower time but the light is making them transpire. That's like sweating for plant. too much transpire and they will die trying to drink that much water.
LOC NAR on probation Reviewed by LOC NAR on probation on . Curling Day 18 flowering. 400W HPS on first pic with curling. 3 gal pots soil grow. T5's are not curling the HPS is. Any ideas? All nutrients are the same for HPS and T5's The only difference is the amount of fan, which could contribute to cold or the HPS. Any ideas? Rating: 5