The Natural (dry) process is the oldest coffee processing method, originating in Ethiopia. Instead of removing the skin and fruit flesh before drying (as in the washed process), the entire ripe red cherry is spread out on drying beds under the sun.

Drying whole cherries on raised African beds.
The core principle of this method is allowing the coffee bean to absorb natural sugars and flavors from the fruit flesh during a drying period that lasts 2 to 4 weeks. After harvesting, cherries must be spread thinly and raked continuously to ensure airflow and prevent unwanted fermentation.
The natural process carries the highest risk as it relies entirely on weather. If frequent rain occurs or ambient humidity is too high, cherries are prone to mold or over-fermentation, producing defect flavors like earthy, moldy, or sharp vinegar notes.
When executed perfectly, natural processed coffee delivers an incredibly vibrant and dynamic flavor profile. It is typically described as having a heavy body, high sweetness, and intense fruit notes (berry-like, tropical fruits).
Natural coffee is the embodiment of terroir and traditional processing. Despite the inherent risks, exceptional Naturals are always among the most sought-after by Specialty coffee roasters.