This is really an open-ended question, it depends on how YOU want to grow.
I grow up to 35 plants in a 2x4’ space and my mate grows just one plant in a 4x4’ space.
you can take all the suggestions from all the guys that grow differently in different size and style pots and differing amounts but in the end, it is just your decision.
one thread to look at for good yield numbers is this one from @Takeshy
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