Uganda Robusta SC18

Robusta beans are denser than Arabica and require slightly higher roasting temperatures and longer development times. SC18 screen size means consistent bean density, which translates to even roasting with fewer hot spots. First crack occurs at a higher temperature than Arabica. Do not rush the development phase.

Uganda is one of Robusta coffee's ancestral homes. Coffea canephora, the species that Robusta belongs to, grew wild along the northern shores of Lake Victoria for centuries before commercial cultivation began. Smallholder farmers in the Lake Victoria basin have cultivated Robusta as a primary cash crop for generations, and the region's elevation of 1,200 to 1,500 metres above sea level is high for Robusta, producing a cleaner, more complex cup than lowland-grown Robusta from other origins.

This lot is sourced from the Nganda and Erecta varietals, the two primary Robusta cultivars native to Uganda, within a 300 km radius of Lake Victoria. Natural processing — sun-drying the whole cherry before milling — concentrates the bean's inherent sweetness and contributes to the grape and spice character in the cup. The SC18 screen size grade ensures large, dense, uniform beans that roast consistently across both small home roasting batches and larger commercial production runs.

Robusta today represents roughly 40% of global coffee production, and its role in modern roasting is being reassessed. When cultivated and processed with care, Ugandan Robusta offers structure, intensity, and consistency — delivering excellent crema and body in espresso, reliable flavour performance in blends, and growing appeal as a distinctive single origin coffee. This lot sits at the quality end of that spectrum, scored SCA 82.5 and selected for clean cup character rather than commodity volume.

What is Robusta coffee and how is it different from Arabica?

Robusta (Coffea canephora) is a separate coffee species from Arabica (Coffea arabica). It contains roughly twice the caffeine of Arabica, produces significantly more crema in espresso, and has a heavier, more coating body. Robusta tends toward earthy, spiced, and nutty flavour notes rather than the fruit and floral character of Arabica. At SC18 specialty grade, Uganda Robusta produces a much cleaner, more nuanced cup than commodity Robusta, with distinct grape, clove, and caramel character rather than flat bitterness.

Why do espresso roasters use Robusta in their blends?

Robusta adds three things to an espresso blend that Arabica cannot replicate at the same cost: crema, body, and caffeine. The higher oil content in Robusta beans produces a thicker, more persistent crema than pure Arabica espresso. The heavy body anchors the blend and prevents it from tasting thin under steamed milk. A 10 to 20% Robusta addition in an espresso blend significantly increases perceived strength and mouthfeel without overpowering the Arabica character.

What does SC18 mean?

SC18 refers to screen size 18, a grading system that measures green bean diameter. Screen 18 beans pass through a 18/64-inch perforated screen, indicating a larger, denser bean. Larger screen sizes generally correlate with more even roasting, fewer defects, and a cleaner cup. SC18 is considered premium grade for Robusta coffee from Uganda.

How should I store green coffee beans?

Store in a cool, dry place away from direct light and moisture. Green coffee is stable for 12 to 18 months when stored properly. We ship all our green coffee in 9 layer hermetic Ecotact bags to preserve moisture content and the aromatic character of this lot between roasting sessions.

Is this available for wholesale?

Yes. This Uganda Robusta SC18 lot is available for wholesale supply to home roasters, small roasteries, and commercial buyers. The 30 lb size suits regular production roasting. For volume pricing, recurring supply, or larger quantities, visit our wholesale inquiry page or contact us directly.