- Coffee species: The two main commercial species are Arabica (Coffea arabica) and Robusta (Coffea canephora). Arabica accounts for about 60% of global production and grows at higher altitudes, yielding sweeter, more complex flavors. Robusta grows at low altitudes, contains more caffeine, and produces harsher, earthier profiles often used in espresso blends for crema.
- Growing regions: Coffee is cultivated within the Bean Belt, the equatorial band between 25 degrees north and 30 degrees south latitude. Key origin countries include Ethiopia, Colombia, Brazil, Kenya, Costa Rica, Vietnam, and Indonesia. Each region imparts distinct flavor notes due to climate, soil, and processing methods.
- Arabica varieties: Typica, Bourbon, Caturra, and Geisha are among the most recognized. Typica is a foundational variety with balanced cup quality. Bourbon produces sweet, clean cups. Caturra is a compact mutant of Bourbon with higher yields. Geisha, originally from Ethiopia, is prized for floral and tea-like characteristics.
- Robusta varieties: Common robusta varieties include Erecta, Nganda, and Conilon. Robusta is more disease-resistant and higher yielding than Arabica. It contributes body and crema to espresso blends. Specialty robusta, when processed carefully, can exhibit chocolate and nut notes without the typical burnt rubber flavor.
- Processing methods: After harvesting, coffee cherries undergo wet (washed), dry (natural), or semi-dry (honey) processing. Washed processing removes the fruit before drying, resulting in clean, bright acidity. Natural processing dries the whole cherry, imparting fruity, fermented notes. Honey processing removes some mucilage, balancing body and acidity.
- Green coffee grading: Beans are graded by size (screen size), density, defect count, and moisture content. Specialty grade requires zero primary defects and fewer than five secondary defects per 350 grams of sample. Grade determines price and suitability for specific roast profiles or blends.
- Traceability and certification: Direct trade, Fair Trade, Rainforest Alliance, and Organic certifications influence sourcing decisions. Traceability from farm to roastery allows quality control and ethical assurance. Certified coffees often command premium prices but guarantee certain environmental and social practices.
- Crop cycle and seasonality: Coffee harvests occur once or twice per year depending on hemisphere. Knowing harvest timing helps roasters manage green inventory and plan for freshness. Fresh crop coffee typically has more moisture and requires different roasting adjustments than aged coffee.
Situation: A new wholesale client visits the roastery and asks about the origin of the house espresso blend. The roaster wants to highlight the blend's composition and regional contributions.
Guest Type: Potential wholesale partner (cafe owner)
Recommended Approach: The roaster explains that the blend uses a washed Colombian from Huila for bright acidity, a natural Ethiopian Yirgacheffe for berry notes, and a washed Brazilian Santos for body and chocolate finish. Each component is sourced from a direct trade relationship that pays above Fair Trade premiums.
Outcome: The client gains confidence in the product's quality and ethical sourcing, leading to a trial order. The roaster documents the origin details on the bag label for consumer transparency.
Standard: European Coffee Directive (EU) requirements for origin labeling and traceability. Roasters must maintain records of green coffee lot numbers, country of origin, and supplier certifications. The Food Safety Modernization Act (FSMA) in the US requires similar traceability for imported beans. Compliance ensures that a recall can be traced to the specific shipment and farm.
- Arabica and Robusta are the two main coffee species with distinct flavor profiles and agronomic characteristics.
- Processing method (washed, natural, honey) dramatically affects cup flavor and roast development needs.
- Green coffee grading defines defects and moisture thresholds for specialty versus commodity grades.
- Traceability and certification systems support quality assurance and ethical sourcing commitments.