If would be nice if there was an actual "south" though. Eg:
South: the most plants, some crops also freely growing as grasses
East/West: less plants, less crops (unless in strongly agricultural places, eg sartola and koivula)
North: very few plants, no agriculture in villages
Right now if you just move a little south from any north tribe village, you'll get the full thing, there's no progression.
Also, it's true that it's colder in the north, but you still can't dry earlier and for longer. The drying start/stop periods are fixed.