Most quality arabica coffee grows at a high elevation close to the equator - generally speaking, great coffee grows from 1400-2200 meters above sea level (masl). Depending on local circumstances, this can be higher or lower.
At the higher elevation points, coffee growing elevation begins to cross over with tea growing elevation which starts at around 1700-1800 masl. When looking at coffee growing elevation, temperature and sun exposure play an important role. Lower elevation or north facing farms often benefit from slow ripening of cherries which bring out higher sugar levels. If the farm is located too high, then the risk of frost/burning is high and can destroy cherries.
With global farming we have observed that the risk of coffee diseases creeps up higher in terms of elevation – which threatens quality arabica beans.