World Wide Advice on a good potting mix

[BudsZA]

Hi I'm looking for a good easy recipe for a potting mix suitable for an outdoor autoflower. So far I have coco coir, perlite, vermiculite and worm castings. Also what's a good pot size for an auto? I'm using biobizz range of nutrients

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[Quater]

I would use 15 Liter pots at least better 20-30 liters for maximum root expansion a fluffy poting mix with medium nutriens in the soil