Since the portal actually only produces ElvenarinZero, it will be pretty much out of work for me as well. I will use my tons of PP's and save other resources .And that means that at least in my case my Portal produces nothing (And will do for the whole chapter). All Elvenarin0 will be produced by PPs in my case (to save more precious resources).
In any case, Unurium will be a pretty limiting factor for me, as I will produce more seeds than I can collect Unurium. For this reason I'm producing live already plenty of sentient goods (luckily Simia is fully developed) so that I can only produce Unurium in the first time and don't have to worry about seeds.