What is altitude in coffee growing and why does it matter?

Altitude is one of the most significant variables in determining how a coffee tastes. It affects temperature, which affects how quickly the coffee cherry matures - and that development rate has a direct bearing on the flavour you end up with in the cup.

Coffee grown at higher altitudes - typically between 1,500 and 2,200 metres above sea level for the best specialty lots - matures more slowly in cooler conditions with a greater diurnal temperature swing between day and night. That slower maturation gives the cherry more time to build complex organic acids and sugars. The result is typically brighter acidity, more defined fruit character, and greater overall complexity.

Lower-grown coffees develop faster, producing heavier body, softer acidity, and simpler flavour - often more suited to commercial blending than specialty. Altitude is almost always listed on green coffee offer sheets for this reason. It's a strong indicator, but it interacts with variety, processing, and farm management - no single variable tells the whole story on its own.