if vendors from outside states follow the rules for what can be sold in CA, then they can sell in CA also; CA can't favor its own farmers. Also CA can't control what those same producers sell outside of CA, but they can control any production within the state.
The only other aspect I think has to do with whether federal FDA and Agriculture regulations take any precedence over CA, but that's not interstate commerce.
The only other aspect I think has to do with whether federal FDA and Agriculture regulations take any precedence over CA, but that's not interstate commerce.