Cold Washed Rume Sudan
Introducing our latest release - a Cold Washed Rume Sudan pushed to the limit. Cultivated at the Poma Research Station, this lot represents our ongoing pursuit to understand, and expand, the boundaries of coffee quality.
What happens when Rume Sudan is given idealised growing conditions free from environmental stress? We are learning how far density and aroma complexity can be pushed—how far the variety can go when its environment is precisely and deliberately shaped. After harvest, the cherries undergo our signature cold washed process—a method designed to preserve inherent aromas shaped by the variety and the environment, enhance articulation, and protect the bright fruitiness Rume Sudan is known for.
Expect a cup that is clean, intensely expressive, and structurally wild, showcasing the unique crossing between a world-famous variety and a distinctly designed terroir.
What’s in the box
Cold Washed Rume Sudan
- Coffee will be roasted on December 2nd and ship the following day
- DHL Express within 1-3 days from Denmark
Research Rarities Collection
The Research Rarities Collection represents a curated selection of exclusive, seasonally released coffees originating from our research program. Each offering reflects explorations of pioneering cultivation techniques and innovative drying processes. Developed in close collaboration with some of the best coffee growers in the world and industry experts, these limited-edition coffees exemplify our ongoing commitment to excellence, agricultural sustainability, and innovation within the field. Through this collection, we provide consumers with a rare opportunity to experience the forefront of coffee development.
Rume Sudan
Rume Sudan (syn. Sudan Rume) is a rare, wild-origin landrace variety of Coffea arabica, first collected in the 1940s from the Boma Plateau in southeastern South Sudan (historically referred to as the Poma Plateau region in certain botanical records), near the Ethiopian border. Genetically one of the purest representatives of ancient Arabica populations, it exhibits close proximity to wild Ethiopian typica-like ancestors with minimal human-induced hybridization. Characterized by low agronomic yield and moderate susceptibility to certain pathogens in non-native environments, it nonetheless demonstrates superior resistance to Coffee Berry Disease (CBD) and Coffee Leaf Rust (CLR) compared to classic Bourbon and Typica lineages, rendering it valuable in breeding programs for introgressing disease tolerance and exceptional cup quality traits. Its elongated beans and distinctive sensory profile—marked by intense floral aromatics, vibrant acidity, and tropical fruit notes—have elevated Rume Sudan to elite status in specialty coffee cultivation, particularly when processed under controlled conditions in high-altitude terroirs.
Cold Washed Process
The coffee cherries were subjected to an initial cold storage period of 48 hours at 8°C. This gentle chilling process preserves and intensifies the coffee’s aromas without inducing fermentation, thereby safeguarding its natural taste profile. Subsequently, the cherries were depulped and underwent thorough washing and drying at low temperatures in a pressurized, rotating tumble dryer. This meticulous drying procedure ensures uniformity, resulting in a clean and crisp final product.
Poma Research Station
Our Coffee Research Station was established six years ago in a climate-controlled greenhouse in Fyn, Denmark. Within this greenhouse, we manipulate environmental factors based on algorithms that mimic plant processes. This allows us to study how coffee trees react to climate change while also maintaining a stable environment for investigating the impact of farming practices.
Technical Data
Producer: POMA
Origin: POMA Research Station
Altitude: 2000 masl (simulated)
Variety: Rume Sudan
Process: Cold Washed
Harvest: August 2025
Brewing Advice
Rested coffee
We recommend resting our coffees for at least 10 days after the roast date, and we often find our coffee the most expressive around 3 weeks.
Water
To prepare, simply add 3.0g of the mineral concentrate to every 1 litre of high-quality demineralised water, then give it a good shake. This curated mixture will result in a mineral concentration of 90 parts per million (ppm) of perfectly balanced mineral compositions, optimising the brewing conditions for an exceptional coffee experience.
Brewing Parameters
We recommend using 13 grams of coffees to 200 grams of water. A coarse grind size approximately 900 micron. Brewing temperature 92C. Our brewing pattern is a 50g circular pour every 40 seconds. Total brew time is 3:00.
