Best mixture for soil

I am just starting my indoor adventure I need some advice on soil mixture I’m going to use Promix, Sta-Green Vermiculite, and Sta-Green Perlite could you please tell me the mixture of each per pot. I am using 10.5 gallon square tubs. Thanks for your help!

Welcome to ILGM forum. I haven’t used promix so I can’t really help out on suggested mixing. Hopefully someone will be able to help. Good luck growing.

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