Wait so is VPD just Ohm's law for cannabis?One day, there was this little plant called Mary-Jane ( bare with me lol ) & she wasn’t feeling too good, so she called doctor vapour pressure deficit ( doc VPD for short ) to pop over & take her temp.
Indeed, her temp was a little high so doc VPD referred to his little chart and diagnosed that the humidity was too low & lights were too bright for her to absorb moisture properly. Not transpiring as she should, so, with a little tweak, doc had the lights turned down & humidity pumped up & after a few minutes Mary felt much better & perked right up.
thanks doc VPD, you saved the day again