Hi king!! Great tip!! noted here, I've been wanting to do a top-dressing here for a while, I always keep the recipe but the plague is in the tent. I'm going after some compound around here, although I don't have many options but I'll test it.

As for the VPD around here despite the tent conditions being quite stable
usually Air Temp doesn't go above 34 and Leaf Temp 31 / 32.5
measuring by the FLIR camera of a bother.
and the air around here has a good humidity in these times with cold nights

Happy to speak with you! I've seen that someone there likes to study too eheheh =)