How do coffee roasters choose their beans?

Coffee sourcing is the most critical phase of the roasting business, as the quality of the raw green coffee sets an absolute ceiling on the final product. Roasters typically begin by working with green coffee importers, who act as the bridge between remote farms and the roastery. These importers provide 'offering sheets'—detailed documents that list available lots, their cupping scores, processing methods, and regional origins. For a roaster, the process is far more rigorous than simply picking a name; it involves requesting and evaluating physical samples to ensure the beans meet specific sensory standards.

When selecting beans, roasters must balance flavor profiles with logistical realities. They look for high-density beans, which often indicate superior quality and better potential for complex flavor development during roasting. Processing methods—whether washed, natural, or experimental—are scrutinized because they dictate the foundational acidity, body, and sweetness of the coffee. Furthermore, roasters must consider the harvest calendar; buying fresh-crop coffee is essential, as green coffee deteriorates over time, losing its vibrant aromatics and becoming 'past crop' or stale.

Economic factors also play a massive role in coffee selection. Small-scale roasters often face challenges with lot sizes, as standard import units are typically 60kg to 70kg bags. This requires careful inventory management to ensure the coffee is roasted while still at its peak. Many roasters also prioritize ethical sourcing, seeking out transparent supply chains where they can verify that farmers are paid fairly, which often involves building long-term relationships with specific cooperatives or estates.

Ultimately, the choice of beans is a strategic decision that defines a brand's identity. A roaster specializing in bright, acidic pour-overs will seek out different origins and processing styles than one focused on heavy, chocolatey espresso blends. By understanding the nuances of coffee selection, roasters can curate a menu that tells a story of terroir and craftsmanship, ensuring that every bag sold reflects their commitment to quality.