Brix, what has the humidity been the past few days?
I was at 20%rH yesterday- way too dry!!..great for late flowering im told, not so great for growth especially newborns, im told too.
That's one of my current problems, too.
Last grow, the RH was too high. Now I struggle to keep it above 25%. Even with good air turnover, the RH is only 40 - 60% consistently once the plants are bigger and transpiring more.