Rome 2 Tips and un-/under-documented features

[Bramborough]

Does anyone know how to tell when a province has exhausted it's growth potential? Some regions seem to only have 3 slots versus 4 while capitals also seem to vary somewhat from province to province. I am guessing it is when all potential building slots disappear but I am hoping for confirmation.

It is true that there are varying numbers of build slots for each settlement, but it is not random. The differences in slots among various settlements is due to two factors: First, whether the city is a capital or a minor, and second, whether it is coastal or inland. The city and port slots are always fixed (e.g., the player cannot opt to replace a port or city with, say, a farm or barracks). So, settlements have a consistent number of "player-discretion" slots as far as what is built in them (4 for capitals, 2 for minors).

Coastal capitals have 6 slots (1 city, 1 port, 4 discretionary).
Inland capitals have 5 slots (1 city, 4 discretionary).
Coastal minor settlements have 4 slots (1 town, 1 port, 2 discretionary).
Inland minor settlements have 3 slots (1 town, 2 discretionary).

Once all settlements in a province have reached those numbers, then provincial growth stops.