I'm keeping all variables identical to my previous grow where I was locked on to 1.0 during veg. My EC/nutrients are the exact same down to the ml. I kept paper notes so I'd be able to do a 1:1 comparison. The only thing that changed is the RH, which in turn results in the higher 1.4 VPD value.
I guess one other change is the feeding frequency, but that's out of necessity since they drink more at 1.4 and need to be watered more often as the coco dries out faster. So even though they're getting the same nutrient ratios to the ml, the 1.4 veg is technically getting more accumulated nutrients since the feedings are more frequent. I water on an as needed basis, judging by the weight of the pots. Before each new feeding, I always let the coco get fairly dry, but not bone dry to the point where there's any wilting.
The veg solution they get is Canna Coco A + B, Rhizotonic, Roots Excelurator, CalMag, ProTekt silica, Cannazym, Thrive Alive B-1 Red (nutrient and foliar), and Great White. The Great White isn't as effective in coco as it would be in a soil blend, but it still helps the root zone to a degree. I've noticed I get finer root hairs with Rhizotonic and more hearty roots with Roots Excelurator, so I rotate between the two every other feeding. I don't combine them in the same solution.
The previous 1.0 and current 1.4 both receive the exact same foliar feeding, which is a daily foliar feeding of Thrive Alive B-1 Red. They get a foliar feed each day, right when the lights come on. The light is dimmed to 25% for the first hour to avoid burning the leaves. After an hour, there are no more droplets on the leaves acting as magnifying glasses, so it's safe to bump up the light intensity, which I dial to 50% for the first week of veg and then bump to 75% for the remainder of veg.
