a friend who uses promix + extra perlite has great results. waters by hand organic teas.
promix is neutral with no added slow release fertilizer.
pretty easy for you to mix in your own blood,blone,kelp etc if you choose to.
has dolimite lime premixed into it. also an inorganic?wetting?agent? but i wouldnt be concenred about it. moisten soil with a slow watering before you use. optional to add extra dolimite lime if u want.

if you're gonna be mixing soil indoors garbage bags, rubbermaid storage containers w/lids and plastic drop sheets are pretty good friends to have around.