[DirectorTsaarx]

You could also remove resource converters from the facility list to prevent using them to create organics. You'd probably also have to remove the Value Improvement Plants (or modify them so they don't increase Organics production).

Also, if you create starting planets in the map editor, can't you specify resource levels? I haven't upgraded to 1.35 yet because of the fighter bugs, so I haven't played with the map editor yet.

I'd also recommend allowing homeworlds to generate organics anyway, because otherwise it would be too difficult to build anything. The justification could be spice stockpiles and/or some rudimentary level of spice trade.