Knowledge Base
Coffee & Tea Guides
Brew better and explore more — buying guides, how-tos, and explainers for every coffee and tea ritual.
Explainer
Udain Coffee: The Yemeni District Behind the Udaini Name
Al Udayn in Ibb is the greenest corner of Yemen's coffee map, and the place the landrace name Udaini is generally said to point at. What the district actually grows, and why its name ended up on a variety label.
Explainer
Bura'a Coffee: The Wet Exception in a Dry Origin
Bura'a is the one Yemeni coffee name attached to a forest rather than a drought. An isolated granite massif above the Tihama plain catches Red Sea moisture and holds one of Arabia's last relict woodlands, which changes shade, drying and pest pressure in ways the rest of Yemen never has to think about.
Explainer
Yafa Coffee: Southern Yemen's Historic Coffee Name
Yafa is southern Yemen's best-known coffee name — a terraced highland region straddling Lahij and Abyan whose coffee historically moved down to Aden rather than across to the Red Sea. Here is what the name actually tells you, and what the thin public record does not.
Explainer
Raymah Coffee: Slope, Isolation and Yemen’s Steepest Terraces
Raymah is one of Yemen’s named coffee governorates and among its most vertical farmland: terraces stacked up near-vertical slopes around Al-Jabin, tiny holdings, rooftop drying, and a public record thin enough to demand hedging.
Explainer
Coffee Container Shipping: Container Rain and the Ocean Leg
Most green coffee crosses an ocean in a sealed steel box, and those weeks are one of the least visible places a lot can degrade. Here is how container rain forms, and what liners, desiccant and stuffing patterns actually do about it.
Explainer
Coffee Roaster Maintenance: The Schedule That Prevents Fires
Roaster maintenance is the management of one substance — chaff — and the schedule that removes it is a fire-prevention plan and a roast-consistency plan at once. Here is what to clean, how often, and why a clogged cyclone quietly changes the roast.
Explainer
Roasting Decaf: Why Colour Lies and Your Roast Profile Breaks
Decaffeinated green coffee starts brown, takes on heat faster and cracks quieter, so it looks finished long before it is. Here is why colour lies on decaf, and how to rebuild the roast around time, rate of rise and sound instead.
Explainer
Coffee Roaster Preheating: Why the First Batch Never Matches
Preheating loads a roaster's steel with energy before any coffee goes in. Why soak time matters as much as target temperature, and why batch one misbehaves.
Explainer
The Coffee Thermocouple: The Instrument Behind Every Roast Curve
Every roast curve is produced by a thermocouple, and the probe measures its own junction rather than the beans. Type, diameter, placement and immersion depth change the numbers more than the coffee does.
Explainer
Jackson Coffee Variety: The Bourbon Selection of the Great Lakes
Jackson is a tall, Bourbon-related arabica selection planted across Burundi, Rwanda and the wider Great Lakes highlands. It is vigorous, high-yielding and fully rust-susceptible — and it is the clearest proof that the word Bourbon on a Great Lakes bag names a family of local selections rather than a single plant.
Explainer
KP423 Coffee Variety: The Kent Selection Rust Caught Up With
KP423 is a Kent-derived arabica selection out of Tanzania that served East African plantations for decades as a rust-tolerant workhorse — until the rust caught up. What the record documents, what it disputes, and why the cycle keeps repeating.
Explainer
Caturra Chiroso: The Colombian Variety That Is Not a Caturra
Caturra Chiroso is Colombia's most talked-about naming accident. Reported genetic work places this Urrao variety with Ethiopian landrace material rather than with Caturra, and the story shows why a field name is never a genome.
Explainer
Ethiosar Coffee Variety: The Hybrid Named After Its Parents
Ethiosar's name is its recipe: a wild-origin East African parent crossed into a rust-resistant Sarchimor line. But its public record is thin. Here is what is documented, what is only claimed, and what the F1 label really means.
Explainer
Typica Mejorado: Ecuador's Not-Quite-Typica Star Variety
Typica Mejorado is an Ecuadorian specialty name for a tall, low-yielding, intensely floral Arabica whose reputation is far better settled than its genetics.
Explainer
Nyasa Coffee Variety: Malawi's Own Arabica, Honestly Explained
Nyasa is one of the varieties that gives Malawian coffee its own identity: an arabica cataloged as Nyasaland, named for Lake Nyasa and the country Malawi used to be. Here is what the record actually documents, where the sources openly conflict, and exactly where the evidence runs out.
Explainer
Bourbon Ají: Colombia’s Aromatic, Misnamed Bourbon
Bourbon Ají is a Colombian farm-selected variety from Huila, named for a faintly spicy, savoury aroma. Despite the name, commissioned genetic testing reported it is not Bourbon at all but Ethiopian landrace material.
Explainer
SL-14 Coffee Variety: The Scott Labs Selection Nobody Talks About
SL-14 is the third Scott Agricultural Laboratories selection, retained in 1930s Kenya for drought tolerance and resilience rather than for the cup that made SL28 famous. Here is what the thin public record actually supports.
Explainer
Ngozi Coffee: Inside Burundi's Dense Washing-Station Belt
Ngozi is Burundi's north-central coffee belt: crowded hills, tiny smallholder plots and one of the highest concentrations of washing stations in the country. Here is what that density means in the cup.
Explainer
Kayanza Coffee: Inside Burundi's Finest Coffee Province
Kayanza, in Burundi's far north on the Rwandan border, produces the bulk of the country's competition-winning lots. Here is what the altitude, the land and the washing-station structure do to the cup, and why the station, not the farm, is the traceable unit.
Explainer
Bani Matar Coffee: The District Behind Mocha Sanani
Bani Matar, west of Sana'a, is the classic source of Mocha Sanani — a trade name, not a variety and not a farm. Here is what the district grows, how it dries it, and how it cups.
Explainer
Haraz Coffee: Inside Yemen's Terraced Mountain Origin
Haraz is the terraced mountain district west of Sana'a that grows some of Yemen's most sought-after coffee. What the stone terraces, the water scarcity and the rooftop naturals do to the cup.
Explainer
Puebla Coffee: Inside the Sierra Norte Smallholder Origin
Puebla is one of Mexico's largest coffee states and one of its least estate-like. Almost all of it is grown by Nahua and Totonac smallholders on shaded plots in the Sierra Norte, sold through cooperatives.
Explainer
Veracruz Coffee: Where Coffee in Mexico Began
Veracruz is where coffee in Mexico began and it is still the country's second-largest producing state. Inside its altitude split, from humid lowlands to high-grown Coatepec, Huatusco and Xico.
Explainer
Agalta Coffee: Honduras's Quietest Growing Region
Agalta Tropical is the sixth and least-known of Honduras's coffee regions: eastern, cloud-forested Olancho, where tropical fruit and chocolate meet long roads to market.