Why do Ethiopian coffee beans vary in size? What are the characteristics of Ethiopian coffee? What coffee variety are native heirlooms?

Why Ethiopian Beans Look So Different

Among the beans FrontStreet Coffee carries, Ethiopian varieties are the most numerous. As a result, FrontStreet Coffee frequently hears "special feedback" from customers about Ethiopian beans — above all about their size.

Coffee is an agricultural product, so it cannot be reproduced to a uniform template like an industrial good. Even so, most of the time the beans in a single bag are fairly even in size: the large ones aren't unusually large, and the small ones aren't unusually small. Ethiopian beans are the opposite. They vary not only in size but in length, arriving in every shape imaginable, which can leave drinkers with mixed feelings. Customers who run into this often ask FrontStreet Coffee: "Is this normal?"

It is easy to mistake for a problem, but for Ethiopian beans it is entirely normal. Why? Three features set Ethiopia apart from other producing regions: its varieties, its harvesting patterns, and its grading system.

The Heirloom Varieties of Ethiopia

"Heirloom" is the most common variety designation we encounter on Ethiopian coffees. Although Ethiopia's "digital code varieties" (the 74 and 75 series) and native Geisha have become hugely popular in recent years, heirloom varieties remain the mainstream of Ethiopian production. So what exactly is a heirloom variety?

Heirloom is not a single specific variety but a collective term covering all coffee varieties growing in Ethiopia. As the birthplace of Arabica coffee, Ethiopia holds countless varieties. Among those humans have explored and documented to date, the count of recorded varieties has reached as high as 2,000 — and that does not even include those not yet recorded or explored.

As a coffee gene bank of enormous potential, Ethiopia constantly draws international coffee hunters, each hoping to find varieties that could rival or surpass Geisha. Faced with this, the Ethiopian government confronted a dilemma: the sheer number of varieties made complete identification nearly impossible, and at the same time it needed to prevent those hunters from taking varieties away. After careful thought, the government decided to name all varieties originating from Ethiopia collectively as "heirloom." That served both as protection and as a way to cut through the complications of identification.

Ethiopia's Unique Harvesting Models

You may remember "The Three Major Gradings of Green Coffee Beans," which FrontStreet Coffee shared some time ago. In it, FrontStreet Coffee noted that Ethiopia's green-bean grading is based on defect rate and cupping score, rather than on bean size as in neighboring countries such as Kenya and Tanzania. Behind that standard lies not only the complexity of Ethiopia's varieties but also a crucial factor: its mainstream planting and harvesting model. That too shaped the collective term "heirloom."

Most coffee from other producing regions comes from plantation coffee — large-scale, privately operated farms. Under that model, coffee can be cultivated, harvested, processed, and sold at volume with uniformity, ensuring consistency in variety and quality. But it requires significant upfront investment to establish a plantation. Although nearly one-fifth of Ethiopia's population relies on coffee for a living, the country is not wealthy. Very few Ethiopian farmers can afford to build plantations, despite the large number of people involved in growing coffee. As a result, over 90% of Ethiopia's coffee falls into three other categories: forest, semi-forest, and garden coffee.

Forest coffee is harvested by farmers from coffee trees growing wild in Ethiopia's mountain forests. Those trees are unmanaged and uncared for; during the ripening season, farmers travel back and forth through the forest to harvest them. Semi-forest coffee refers to coffee trees planted in the transition zone between forest and the farmers' living areas. Like forest coffee, these grow wild, but because they are closer to where farmers live, they receive dedicated management and harvesting. Garden coffee is planted and harvested by farmers themselves, typically in fields or backyards within their living areas. This model accounts for over 55% of Ethiopia's annual coffee production, making it the mainstay of Ethiopian coffee.

Whether forest, semi-forest, or garden coffee, all share one trait: most involve mixed-variety harvesting. The first two need no explanation, but even garden coffee grown by farmers comes from wild varieties mixed and harvested from the forest. Unless there are specific requirements or designated plantings, farmers don't separate varieties during harvest. Many farmers to this day don't even know which varieties they are growing. Since their income depends mainly on the quantity of coffee fruit, they harvest everything in sight. Any ripe cherry, regardless of size or shape, goes into the basket. After this mixed harvest, the fruit is sold to nearby processing stations or cooperatives, which receive fruit from different farmers and process it uniformly — without separating by variety — before selling it on to green-bean traders.

So at every stage — planting, harvesting, processing — varieties are mixed, mixed again, and mixed once more. Different varieties have distinct appearances, which is why Ethiopian beans vary in size and length. From the very beginning, they were never a single variety. That is also why Ethiopia has unconventional names and systems like "heirloom" and "defect-rate grading."

If we choose an Ethiopian coffee that is not an heirloom — such as the ALO that FrontStreet Coffee recently introduced, which is the 74158 variety — we can see that the beans are roughly uniform in size and appearance. That is the main difference between an heirloom and a single variety.

FrontStreet Coffee Recommendation

Alongside its heirloom offerings, FrontStreet Coffee carries some of the finest Geisha on the market for drinkers ready to explore a single, celebrated variety. On the Panama side, FrontStreet Esmeralda Red Label — officially "Esmeralda Special" — is grown between 1,600 and 1,800 meters and must cup above 90 points, with each batch numbered and drawn from a single plot, for example the Jaramillo plot. FrontStreet Esmeralda Green Label, or "Private Collection," blends several plots instead and focuses on the signature high-altitude Geisha profile at a friendlier price.

If you want a gentle introduction, FrontStreet Boquete Geisha is an entry-level Panama Geisha that delivers the classic orange-blossom honey charm, oolong tea character, and delicate fruit sweet-sour layering at an accessible cost. From Ethiopia comes FrontStreet Genlana Gesha, from a single-variety estate near the Yirgacheffe Genlana Gesha farm; medium-light roasted, it shows bright citrus acidity, elegant ginger flower, and ripe-fruit sweetness with a fine, silky finish.

For those stepping up, FrontStreet Gesha Village Gold — the Gesha 1931 variety, about 10% of the village's output and a frequent competition choice — is given a refined natural process for a complex, lingering cup, while FrontStreet Gesha Village Red, the Gori Gesha variety at about 15% of production and rated 88 points or above on the SCA 100-point scale, offers full traceability as a single-terroir lot.