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Arabica varieties - Bourbon, Typica, SL28, Caturra, Catuai

You already know that arabica is better than robusta, but that is only the start of the story. Because arabica is not one flavour but a whole family of varieties, exactly as grapes split into varieties. Bourbon, Typica, Caturra, Catuai, SL28 - these names appear ever more often on specialty bags, and each hides a different flavour profile, a different yield and a different resistance to disease. Understanding arabica varieties is stepping up to a level where coffee stops being an anonymous bean and becomes a product of specific lineage, like wine from a specific grape. Where did they come from, how do they differ and why do some give outstanding coffee but fall ill, while others are resistant but simpler? Here is a guide to the most important arabica varieties, based on facts: their origin, flavour profiles, yield and resistance, with a comparison table at the end.

Arabica is a species, a variety is a cultivar

Let us start by ordering the terms, because it is the key to everything else. Arabica and robusta are two different species of coffee, but within arabica there are many varieties, that is cultivars. It is exactly the same logic as in wine: one species of vine, and within it hundreds of varieties like cabernet or chardonnay. An arabica variety is a variant of the coffee plant with certain heritable traits: a flavour profile, yield, resistance to disease and plant form. Two coffees of the same species but different varieties can taste entirely differently, even from the same farm. That is why more and more roasters give the variety on the bag, because it, alongside origin and processing, shapes the flavour in the cup. Understanding that a variety is the coffee equivalent of a grape variety opens an entirely new level of understanding coffee. The rest of this post is an overview of the most important varieties and what each brings.

Typica - the mother of all varieties

In the beginning there was Typica, one of the two foundational, oldest arabica varieties from which many others descend. Typica produces coffees that are sweet, clean and well-balanced, with complex acidity and subtle fruity and floral notes. It is a variety prized for the elegance and clarity of its flavour, considered a benchmark of classic, refined coffee. It has its price, though: Typica is famous for high quality in the cup but low yield and high susceptibility to disease. In other words, it gives outstanding coffee but grows sparsely and falls ill easily, which makes it difficult and costly to grow. That is why, despite its excellent flavour, it is rarer than its more productive descendants. Typica is the genetic root of a huge part of today varieties, so its elegant, clean profile echoes in many coffees. It is the mother of the line, with which the history of arabica varieties begins.

Bourbon - the second foundational variety

Alongside Typica stands Bourbon, the second of the two foundational varieties from which most of today arabica originated. Bourbon is highly prized for cup quality: it has sweet, complex flavours, a well-rounded acidity and a medium body. It is a variety combining refinement with a little more approachability than Typica, giving coffees that are rich and harmonious. In terms of growing, Bourbon has a higher yield than Typica, though it still remains susceptible to disease. This makes it a little more practical, but far from the resistance of newer varieties. Bourbon and Typica are the two pillars from which a huge part of the arabica world genetically descends, so knowing their profiles is the foundation of understanding varieties. Many famous, newer varieties are mutations or crosses of Bourbon. Its sweet, complex character with a rounded acidity is one of the most influential profiles in all of coffee, present in countless descendants.

Caturra - a dwarf mutation of Bourbon

From Bourbon came one of the most important working varieties: Caturra. Caturra is a natural mutation of the Bourbon variety, which appeared spontaneously. Its key trait is a dwarf, compact plant form, which makes it easier to harvest and allows denser planting, increasing yield per hectare. Caturra offers high productivity and good cup quality, with bright acidity and a medium body. In specific flavour terms it gives a bright, fruity and well-balanced profile, with typical notes of citrus, red fruits and pronounced acidity. This makes it a popular choice in many countries, especially in Latin America, where it combines practicality of growing with decent flavour. Caturra shows how a natural mutation can give a variety more practical than its parent, while keeping much of its quality. It is a bright, fruity coffee that conquered the world by combining yield with a good profile in the cup.

Catuai - a cross created for yield

The next important variety arose not naturally but through a deliberate cross: Catuai. Catuai is a cross of the Caturra variety with the Mundo Novo variety, bred to combine their advantages. It gives a balanced cup of good acidity and sweetness, often with notes of chocolate and nuts. It is a practical and hardy variety, prized for good yields and resistance to difficult conditions, like strong wind, thanks to holding the cherries firmly on the branches. Catuai is an example of modern coffee breeding, in which varieties are deliberately combined to obtain desired growing and flavour traits. Its profile, with chocolate and nuts, is warmer and more dessert-like than the bright, fruity Caturra. This shows that crossing varieties lets coffee be shaped for the specific needs of the grower and the palate. Catuai is a solid, hardy variety, giving a pleasant, balanced cup of a chocolate-nutty character, widely grown especially in Brazil.

SL28 - the Kenyan legend

SL28 has an entirely different story, one of the most famous varieties in the world, coming from Kenya. SL28 was bred in the 1930s and is famous for its complex acidity and resistance to drought. Its flavour profile is rich and complex: bright acidity, fruity notes of blackcurrant and berry, and a full body. It is SL28 that is largely responsible for the legendary, intense, berry-blackcurrant character of the best Kenyan coffees, considered by many among the tastiest in the world. It has its weaknesses, though: it is resistant to drought but susceptible to coffee leaf rust and other diseases. This shows the typical trade-off in the world of varieties: outstanding flavour often goes hand in hand with susceptibility to disease. SL28 is proof that a specific variety can define the flavour of a whole region. Its rich, blackcurrant profile is one of the most recognisable signatures in all of specialty coffee.

The shared trade-off: flavour versus resistance

Looking through these varieties, a recurring pattern emerges that is worth understanding. The main differences between varieties concern three things: yield, resistance to disease and clarity of flavour. And here comes the classic trade-off: the varieties of the most outstanding flavour, like Typica and SL28, often give low yields or fall ill easily, while the more productive and resistant varieties tend to be simpler in flavour. Typica gives great coffee but sparsely and falls ill; Bourbon is more productive but still susceptible; Caturra combines practicality with a good profile; SL28 delights in flavour but fears rust. This trade-off between quality and resistance drives all coffee breeding, especially in the face of threats like coffee leaf rust. Understanding it explains why the best coffees tend to be pricier and rarer - because their varieties are difficult to grow. This tension between flavour and practicality is the axis around which the world of arabica varieties revolves.

A comparison table of varieties

Let us gather the most important varieties in one place, to see the differences at once:

This table shows how varied arabica is and why the variety on the bag carries real information about flavour. These are only five of hundreds of existing varieties, but it is precisely these that are the foundation of the specialty world, which we cover in specialty coffee.

The essentials in brief

Let us gather it up. Arabica is a species, and within it there are many varieties, that is the coffee equivalents of grape varieties. The two foundational, oldest are Typica (sweet, clean, elegant, but low-yield and disease-prone) and Bourbon (sweet, complex, a little more productive). From Bourbon came the dwarf, productive Caturra of a bright, fruity profile. Catuai is a cross of Caturra with Mundo Novo, hardy, of a chocolate-nutty character. The Kenyan SL28 is famous for its rich, blackcurrant-berry flavour and drought resistance, but fears rust. Across the whole world of varieties runs a trade-off: outstanding flavour often goes hand in hand with low yield and susceptibility to disease. Now, seeing a variety name on the bag, you will read from it a real clue about what to expect in the cup, and step up to a higher level of understanding coffee.

Note every coffee in GustoNote - the variety, origin and the notes you sense. Over time you will start to recognise variety signatures, like blackcurrant SL28 or chocolatey Catuai, and consciously choose coffees for your taste.