WanderingJester
Cool shuppy waddling away from explosions
Well the vale would have had to have good farming land. They pretty much had to sustain themselves during the war of the five kings.
As for the westerlands, they probably had the money to hire experts to come and help cultivate their land someway.
Rationing and storing enough food away for a few years is one thing, being self sustaining and still have growth? Idk, maybe I'm having this wrong, but I feel like the only provinces that could self sustain are the ones without the hills and mountains and snow, while the Riverlands and Reach are the only ones that can produce enough to export for a profit.