I have an engineering mindset and want to put in my opinion. I know this is an old thread. I have gone over thier schedules extensively and really know I have it figured out when looking at the old version of the schedule.
The schedule is only any good if you use the whole line up.
If you are just using the trio it will not give you optimal ratios. The other nutes even it out, for example:
Boomerang and Wholly Mackeral are started before Grow Big on the schedule, they both have a decent N ratio. Adding Grow Big as well that early would fry your babies.
But stand alone, Grow Big can start as soon as it is vegging, as soon as it needs N, when the cotyledons start yellowing up.
Also there are points later in the schedule where all three of the Trio are used in conjunction. Just look at the ratio of just the trio. It is not optimal. It is being optimized by the other nutes, and the solubles make a huge impact on those ratios.
When using only the trio, it is better to follow the instructions on the bottle. As far as using Big Bloom continuously, Grow Big in Veg, and Tiger bloom in flower. The actual PPM of the solution needed will vary as I will soon explain.
Every part of the schedule backs this up if you look at it, it is engineered to give the optimal ratios using all of the products, not just the trio.
I can't elaborate on what the PPM comes out compared to the schedule because I only have the Trio. But I only speculate that would fry most of our plants. I can't imagine using all of that in one gallon of water. Also my botany skills are lacking but that PPM is clearly optimized for certain light levels at optimum conditions, 1000 watt light so many feet away on a certain size container on a certain size perfectly filled canopy, I once heard from a self proclaimed expert.
Your plants probably need much less!
Plus your strain, phenotype, health of plant, all vary the optimal amount of required nutrients.
I have no doubt using just the right amount of all thier products in thier test conditions would give you amazing results. But that is just too much for most of us. Especially most of us noobs that seem to be the ones that go straight to the FF.
So there is a very good reason the nute's label varies from the schedule. So you can buy all thier products and have the ratios all calculated up for you, or just buy what you need and follow the simple directions. You don't just keep adding more and more on top of other nutrients without changing the ratios.
So we trio only users have no use for the schedule at all. And in my opinion we have no use for more nutrients than needed until we get the basics nailed down and learn to understand what our plants are telling us. We have to be able to grow a healthy plant first of all and having more fertilizers may make having the perfect ratios a possibility, but it also just unnecessarily complicates things for noobs that need to just make it to harvest without killing thier crop.
Stick with the basics: the Trio, Cal-mag if you use RO, maybe a carb.
Start with a lower than recommended dose of nutes. Learn to read your plants. Learn to WATER PROPERLY! And make sure you PH your water! Master that and then think about micro-managing 20 nutrients for a little bigger yield, 2% more THC, and of course get that dank top shelf flavor.
None of us ever get a perfect harvest on the first couple of grows, expecting to will just be a disappointment. Just make it to harvest without fucking it up too bad, and cure it right, and you will have an enjoyable crop.
Haha, I put alot into this post nobody will probably ever read