How does coffee variety impact its grade?

When we talk about coffee grading, we are often measuring the potential of the plant itself. The variety—or cultivar—is the genetic blueprint of the coffee. Arabica, the species that dominates the specialty market, is prized for its wide range of flavors, from floral and citrusy to chocolatey and nutty. Because of this inherent complexity, Arabica is the only species that consistently reaches the high scores required for specialty grading.

Robusta, on the other hand, is a hardier, more disease-resistant plant that produces a higher caffeine content and a more bitter, earthy flavor. While it is essential for the global coffee industry, it is rarely graded on the same scale as Arabica. In the context of specialty coffee, Robusta is often viewed as a defect or a filler, though this is slowly changing as high-quality 'fine Robusta' begins to emerge in niche markets.

Even within the Arabica species, the variety matters immensely. Heirloom varieties like Geisha are famous for their tea-like, floral profiles and can command record-breaking prices, while more common varieties like Caturra or Bourbon are valued for their balance and reliability. A grader will look for the specific characteristics associated with these varieties; for example, a Bourbon variety should exhibit a certain sweetness and body. If a coffee is labeled as a specific variety but lacks those traits, it may be downgraded.

For the reader, understanding variety is the key to finding what you like. If you prefer bright, acidic coffees, you might look for Ethiopian heirloom varieties. If you prefer something chocolatey and heavy, you might lean toward Brazilian Bourbon. The grade on the bag tells you about the quality of the processing and sorting, but the variety tells you about the potential flavor waiting in your cup.