The first thing that you need is a soil test.
Virginia Tech Soil Testing Lab | Virginia Tech Soil Testing Lab | Virginia Tech, which will tell you what if anything you need to add to your soil.
I am sure the service changes over time,, but,, twice I used the VT service for soil tests,,
The samples were from 1) sandy soil (no organic matter) 2) heavily compost added garden soil,, and 3) typical lawn soil
The two times were 5 years apart,,
BOTH TIMES the results came back the same for EACH of the three sampled areas,,
something like " add XX pounds of 10-10-10 and consider adding yy amount of lime"
There is NO WAY those three locations should have the same recommendations,,
I am convinced they trash the samples, and mail back a standard form response.
Maybe they are different this year,, but, who knows,,
(NOTE, I am not negative on VT, I graduated from the school)
If anything, I may try a commercial testing service,,,
I was just asking to see if anyone has added micronutrients,,
There is really not much to read on the internet about them,, especially as far as results,,,
The stuff I have found mostly conflicts with another article that I find 5 minutes later... :laughing: