First Grow Ever & w/Coco!

tough to be certain from pictures... leaves look glossy and shiny.. that's a sign of too much N -- if that gloss if from teh foliar spray, ignore that. This can lock other things out.. also ensure pH is in good range. 6ish is better target than sub-6, despite common beleifs not based on science. go much below 6 and you will lock things out or require way more than necessary to provide it while also inhibiting other things... 6-6.2 is better target.. consistency is the more important thing as you can easily adjust a recipe to match a status quo pH. depending on how well the coco is buffered, you could have an assortment of problems. Mg is something that takes 30+ days to see first signs, so at 4weeks that might be about the right time to see it start. Very imortant to rule out lockout before adding stuff. I don't see a smorgasborg of symtpoms, so i don't think this is the coco's fault in this case. foliar sprays invite risk.. have a good reason to do it or it's just over-sophisticated and unnecessary. wet plant material is a risk for molds and rot. Anway, my best guess given infor is a slight magnesium deficiency... bump that or add soem epsom salt (if S is not already too high). Magnesium sulfate septahydate i think is what comes in teh foodgrade bags at a local supermarket... buy generic as it's akin to Rx generics... molecularly the same if the guaranteed analysis label says so.

I'm seeing a beginning phosphorus deficiency here (it's probably also combined with a calcium deficiency but can't see solid evidence of that yet). And it's hard to suggest what you might do for it since I'm unfamiliar with what you call H3ad's Formula for Coco.. I AM, however, familiar with GHflora series... that series is meant to be used together throughout the grow but in different portions/ratios... during veg, the ration of Grow, Micro and Bloom should be 1-1-1 ... so, for example, if you were feeding at 1-1-1 and wanted to raise the EC, you could go 1.5-1.5-1.5 ... transitioning to flower is a different ratio and blooming/ripening is yet a different one... those ratios are on the label of each bottle. You can certainly add calmag to the mix or something like their KoolBloom liquid when they're in flower but the basic ratio between Grow, Micro and Bloom should be maintained when comprising your EC... That's about all I can tell you at this point because, as I said, I'm unfamiliar with the other stuff you're using.. but she needs more phosphorus and MAYBE more calcium ... your pH is spot on to allow her to absorb those nutrients. :-D Good luck!