2nd Grow, 1st was carnage

So am using Plagron products. Am kind of following the schedule, but afraid of over doing it. So am using a 1.7ltr bottle rather than 1ltr, which I hope will ensure my solution is always diluted enough.:). But does that mean I may not be feeding my trees enough? I'm also thinking that 3 plants is probably too many for my growth space... I've installed a CO2 bag. No idea how much this will help... I've installed disposable dehumidifier bag too because humidity is way too high.