Adding single ammendments to blended fertilizer?

So I've done a few "super soil" like grows with good success but have a question about if the method is sound in terms of products used. Would it make sense to add single ingredient ammendments to a blended fertilizer mix that contains said ingredients? Does adding the npk ratios of the blend and the added ingredients increase the final NPK?

I'm using DTE vegan mix 3-2-2, with added tablespoons/per gal. of the listed

Rock phosphate=0-3-0
Neem seed meal=6-1-2
Soy bean meal=7-1-2
Langbeinite=0-0-2.5
Alfalfa meal=2.5-0.5-2.5
Kelp meal=1-0.1-2

Less the cotton seed meal the list above is what's already in the vegan mix. Will adding extra of those increase and prolong soil fertility for the length of the grow?

Don't check only total NPK, but also check other nutrients.

I mean...you can have a 2-2-2 or a 10-10-10 fertilizer, not much problem with that.

But what would happen if your 3-2-2 DTE has Calcium, and on top of that you add another Ca amendments? Also with Mg, S, micros, etc.

JHake said:

Don't check only total NPK, but also check other nutrients.

I mean...you can have a 2-2-2 or a 10-10-10 fertilizer, not much problem with that.

But what would happen if your 3-2-2 DTE has Calcium, and on top of that you add another Ca amendments? Also with Mg, S, micros, etc.

Click to expand...

Good point

Too much calcium will inhibit the uptake of potassium. Keep that in mind.
K is needed in every phase of growth.