Soil help

I would go with a cup of gypsum and 4 cups basalt.

 

What's your main mix? Should be compost, peet/coir, and perlite/vermiculite.

Be careful with these components. As a top dressing they will turn into concrete.

 

I’m new at this myself, and I hear ya!, I took info from multiple sources and committed to my mineral amendments:
Thread from 2012:
Easy Organic Soil Mix for Beginners

Dust from igneous rocks like granite, basalt, azomite, glacial rock dust, etc. is what you want.…..
Mineral amendment: now add 4 cups of your rock dust per cubic foot (7.5 gallons) of soil​

Using info from that thread and from Info TRUE LIVING ORGANICS 2nd EDITION:
this is what I used (it is 3 weeks into the cooking stage):

Per cuf (adjusted for one cubic foot, and sorry for the decimals):

• Dolomite Lime 0.5 cup/ cuf
• Soft Rock Phosphate 0.13 cup/ cuf less if powder more if pellet
• Gypsum 1.0 cup/ cup
• Azomite 5.3 tbs/ cuf
• Green Sand 2tbs/ cuf
• Basalt I did not use but my notes say .25 cup cuf
• I added 1 cup/ cuf ground oyster and 5 cups horticultural char which I consider minerals

That adds up to 2.5 cup/ cuf for my minerals without the char.
Now that I’ve replied, I don’t think I have provided any clarity, just another layer of fuck-meeee! EXCEPT FOR THE LIME AND ROCK PHOSPHATE, sincece it’s minerals, I believe the amounts can be adjusted/ substitute to what you have on hand/ can find/ can afford without harming your soil. Fuck-me again….

This is not advice, just an answer and my chime in, cause I’m in the same f-me boat and that’s what I did with the knowledge I have accumulated. Happy soil mixing.

 

I consider bio char to be an aeration component and housing for microbes. In my soil mix I use 1 cup of basalt, 1 cup of OSF and 1 cup of gypsum per cubic foot, for minerals if you want to use the Azomite I would use half a cup of it and reduce the basalt to a half a cup.

 

The oyster shell flour is a replacement for dolomite, HTH