i have used fox farm nutes succesfully following the feeding chart to the tee. Except for the cha-ching somehow my dumbass bought two bottles of open sesame instead of a cha ching.. but i never add calcium or magnesium just use the fox farm lineup.. some of those are hot though
IF using Only Foxfarms Trio(Big Bloom, Tiger Bloom, Grow Big) your find your plants suffering at somepoint from plant defficiencies. Products like Earth Juice's Microblast would fix them. If you can find a good cal/mg that would work. Im a 100% OMRI organic grower so i only use Big Bloom now in conjuction with products I've carefully selected.
I use to use all 9 Products by foxfarms plus some, Additives(Open, Beastie, Cha-chin) should be added 0.25tsp per gallon twice a week in soil, or 0.5tsp per once a week(my method). Big Bloom should be applied at minimum of 3tsp per gallon, and could be increased to 4tsp-6tsp per gallon right before the 2week flush phase(Smart growers, not unexperienced). 2tsp per gallon Tiger bloom with Bigbloom on the second water without additives if you follow the Once a week additive scheme. Grow big could be added during week 4-5 i'd recomened Only once, and only one of the weeks, extra nitro is benifical but 2 much will do the opposite of what you want. You want Yields, you won't get them. Microbe brew can be fed twice a week at 0.25-.05tsp per gallon, kangaroots can be fed at 0.5tsp per gallon and used once in bloom at a rate of 1tsp per gallon. You can use Microbe brew and kanga roots on 4Inch pots / clones at 1/4th the dose, and also later in bloom, but may or may not be needed. I do both.
But i no longer use Foxfarms full lineup, although it provides great results, same results are easily achieved organically. I make my own clone solution from my Willow tree, instead of buy clonex, or Organic Earth juice Rootstock
I've known cancer patients, who are alive, and some passed on, OMRI organic is a big deal to me, so i no longer Synthetic or man made substances in my Marijuana, and would prefer cows, chickens, and etc to be fed OMRI organically aswell, so when we consume them its still fine. I don't back time released even if its OMRi, thats for crops with Long life cycles(Marijuana is short, even with long vegative stages).
Hope this enlightens everyone.
The' Organist