Yeah the 4-6-2 is my leftover sure start which has dormant microbes, it's a few years old and has lost potency but I like to use it the 1st month to help develop strong root system.
I see your point about the nitrogen.
I'm still going to add molasses for the microbes,
Superthrive for trace nutrients and Purpinator to help Terpene profile and purple up my buds.
I also add organic matter, coffee grounds and tea grounds.
The soil already has worm castings too.
I will check my levels and see how it does.
I may still get something that's a little more nitrogen heavy like some liquid kelp, just to give it a higher boost of nitrogen.
But Dr. Earth's guide suggests using this:
They seem to have a different feeding schedule liquid vs dry.
Since I already have the 1-1-1 liquid and the 3-9-4 flower girl I could get the liquid nitro big 3-0-1 and then the 4-4-4 dry for my other plants too.