Journey Through Java: The World of Coffee Varieties

Embarking on a journey through Java not only alludes to an island in Indonesia but also to a worldwide adventure through the diverse world of coffee varieties. This beloved beverage, which energizes millions daily, has roots that intertwine with culture, geography, and tradition. The study of coffee varieties opens up a vast landscape of flavors, aromas, and stories that can fascinate any coffee lover or enthusiast. Let’s delve into the rich tapestry that is the world of coffee.

The Origins of Coffee

The Discovery of Coffee Beans

Our journey begins in the ancient coffee forests on the Ethiopian plateau, where it is believed that coffee was first discovered by a goat herder named Kaldi. He noticed that his goats, after eating berries from a certain tree, became so spirited that they did not want to sleep at night. Kaldi reported his findings to the abbot of the local monastery, who made a drink with the berries and found that it kept him alert through the long hours of evening prayer.

The knowledge of the energizing berries began to spread. By the 15th century, it was being grown in the Yemeni district of Arabia and, before long, coffee was known in Persia, Egypt, Syria, and Turkey. It was not just a beverage but an entire social experience – enjoyed in homes and in public coffee houses known as qahveh khaneh.

The Spread of Coffee Around the World

Coffee houses quickly became centers of social activity and communication in the major cities of the Middle East. The success of the coffee plant spread to Europe in the 17th century, where it became a popular drink by the mid-17th century. Coffee plants were transported by colonists to tropical countries around the world in an attempt to cultivate it globally. Through painstaking cultivation and trade, coffee established itself as a commodity that is now cultivated in over 70 countries, predominantly between the Tropic of Cancer and the Tropic of Capricorn.

Understanding Coffee Botany

Coffee is not just a single plant but belongs to a genus of flowering plants in the family Rubiaceae. The two most commonly cultivated and important species globally are Coffea arabica (Arabica) and Coffea canephora (commonly known as Robusta).

Coffea Arabica

Arabica coffee is the more dominant of the two, accounting for about 60-70% of the world’s coffee production. Arabica beans tend to have a sweeter, softer taste with tones of sugar, fruit, and berries. Their acidity is higher, with that winey taste that characterizes coffee with excellent acidity.

Coffea Canephora (Robusta)

On the flip side, Robusta coffee tends to be stronger, harsher, and more bitter. It has a higher caffeine content than Arabica, which is partly why it’s less susceptible to pests and diseases. Robusta is generally considered to be of an inferior quality compared to Arabica, but this is not always true and depends on how the beans are cultivated and prepared.

Coffee Varieties and Their Unique Profile

The term “varieties” refers to the subspecies or variations within the coffee plant species. These are akin to different grape varieties within the wine industry. Each variety has its distinct flavor profile, growth conditions, and susceptibility to disease.

Arabica Varieties

Some of the most famous Arabica coffee varieties include Typica, Bourbon, Geisha, and SL28. Each of these varieties can result in dramatically different cup profiles, which can be further influenced by the terroir, or the unique combination of soil, climate, altitude, and other growing conditions of the region where they’re planted.

Typica is the base from which many coffee varieties have been developed, and it typically produces a very clean cup, with sweet and well-balanced acidity. Bourbon tends to be more complex and can produce a sweeter, more nuanced cup than Typica.

Geisha, which often commands higher prices, has gained a reputation for its extraordinary flavor profile, with a floral aroma and often notes of citrus and stone fruits. It requires specific growing conditions, which include high altitude and a steady climate.

SL28 was developed for its ability to resist drought but was discovered to also offer a favorable cup profile with bright acidity and a full body.

Robusta Varieties

Less is often discussed concerning Robusta varieties as they’re generally less varied and tend to be less distinctive in the cup. However, varieties such as Congo and Ugandan native varietals are making a splash in the specialty coffee scene with their unique profiles.

How Terroir Affects Coffee Flavor

Terroir is a term borrowed from the world of winemaking that refers to the environment in which the coffee is grown. This includes myriad factors such as soil, topography, climate, and even the way coffee is grown and processed by farmers. Just as with wine, two coffee varieties can produce wildly different flavors when grown in different regions.

The Role of Altitude

Altitude plays a pivotal role in the development of a coffee’s flavor profile. Higher altitudes often contribute to the coffee’s acidity, creating a more vibrant, lively cup. This is because the cooler temperatures and greater rainfall help to slow the bean’s maturation process, resulting in more complex sugars and desirable acidity. On the other hand, lower altitudes can lead to a decrease in acidity and an increase in body, resulting in a smoother and sometimes more bitter cup, which is typical of many Robusta coffees.

Soil and Topography

Soil type can influence the nutrients available to the coffee plant and hence its flavor. Volcanic soil, for example, tends to be rich in minerals and often leads to coffee with a particularly smooth and sweet profile. The topography of the land, whether it be steep mountains or rolling hills, determines how water drains and affects how the coffee trees grow, which in turn can influence the quality of the coffee cherries that the trees produce.


Consistent and moderate temperatures, along with the ideal amount of rainfall, create favorable conditions for coffee to grow. Extreme conditions like frost or overly dry and hot environments can stress coffee trees, negatively impacting the crop’s quality and flavor profile.

How Processing Methods Impact Coffee Flavors

Once coffee cherries are harvested, they undergo processing to extract the beans before they can be roasted. The methods of processing – wet (washed), dry (natural), and honey – significantly influence the coffee’s final taste.

Washed Process

Washed coffee is known for its clarity and uniformity. In this process, the coffee cherries are de-pulped to remove the outer fruit layers and then fermented in water tanks to remove the mucilage. This highlights the coffee’s intrinsic characteristics and tends to result in a cleaner, more acidic cup that showcases the coffee’s true profile.

Natural Process

In the natural process, the coffee cherries are dried with the fruit still surrounding the beans. This often imparts a fruitier, more robust flavor, as the bean absorbs some of the fruit’s sugars and compounds during the drying process. Coffees processed in this way can exhibit deeper body and complexity but may also show inconsistencies if not managed well.

Honey Process

The honey process is something of a middle ground, where some of the fruit mucilage is left on the bean during the drying phase. This method offers a cup with some of the body and sweetness of natural processed coffees but with a more controlled level of acidity.

Exploring Coffee Regions

Coffee is profoundly influenced by the region where it’s grown. Each region imparts its distinctive taste notes.

Latin America

Countries like Colombia, Costa Rica, and Guatemala are known for producing coffees with balanced acidity and a blend of fruit, nut, and chocolate notes. These coffees are often washed to preserve these characteristics and produce clean and bright flavors.


Ethiopia, the birthplace of coffee, along with Kenya, Tanzania, and Rwanda, offers some of the most complex profiles in the world. Ethiopian coffees can exhibit floral, citrusy notes, with hints of blueberry in both natural and washed coffees, while Kenyan beans are often bold, with pronounced acidity and notes of berry and citrus.


Indonesia, Vietnam, and India contribute some of the most intriguing and diverse profiles. Indonesian coffees, such as those from Sumatra, are famous for their full-bodied, earthy qualities often accompanied by notes of spice and chocolate.

Finishing Thoughts

Java, the nickname often given to coffee, serves as a reminder of just how diverse and interwoven the world of coffee is. From the high-altitude farms of the Ethiopian highlands to the volcanic soil of Central America, the variety, processing, and regional conditions all contribute to the rich tapestry of flavors to be discovered in our cups. As coffee lovers and connoisseurs, there is always more to learn, taste, and explore. As you sip on your next cup of coffee, remember that it bears the legacy of centuries of cultivation and the shared efforts of farmers and producers around the globe. The journey through Java is much more than a trek across an island—it’s an exploration of culture, science, and sensation that continues to captivate and energize the world, one cup at a time.

Frequently Asked Questions

What are the main species of coffee?

The two main species of coffee beans are Coffea arabica, known as Arabica, and Coffea canephora, known as Robusta. Arabica is more widely produced, known for its sweeter, more complex flavor and lower caffeine content, while Robusta is hardier, has a higher caffeine content, and is generally considered to have a stronger, more bitter taste.

What are the differences between Arabica and Robusta coffee?

Arabica and Robusta differ in several key areas. Firstly, Arabica beans tend to be slightly larger and have a more elliptical shape, whereas Robusta beans are smaller and rounder. Flavor-wise, Arabica is often described as smooth and sweet with a range of possible tasting notes including fruits and berries, while Robusta is typically more full-bodied, with a stronger, harsher taste, and a grainier, nutty aftertaste. Arabica is predominantly grown in Latin America, eastern Africa, Asia, and Arabia, while Robusta is mainly found in central and western Africa, throughout southeast Asia, and in Brazil.

How does the coffee growing region affect the flavor of coffee?

The coffee growing region significantly impacts the flavor of coffee due to variations in soil composition, altitude, climate, and farming practices. For instance, coffee grown at higher altitudes tends to have a higher acidity and more pronounced flavor. Latin American coffees are often known for their balance and hint of sweetness, African coffees for their floral and fruity notes, and Asian coffees for their full bodies and earthy, spicy flavors.

What is a coffee varietal?

A coffee varietal is a subspecies of coffee that has naturally occurring genetic differences from other varieties. Varietals can occur naturally in the wild or be developed by farmers to highlight specific characteristics, such as taste, disease resistance, or yield. Each varietal has unique flavor profiles and growing requirements.

Can you name some popular coffee varietals?

Some popular coffee varietals include:

1. Typica – Considered the “archetype” of Arabica, and known for its sweet and clean flavor.
2. Bourbon – Named after an island in the Indian Ocean, it’s known for its complexity and slightly sweet profile.
3. Geisha (or Gesha) – Originating from Ethiopia, famous for its floral and jasmine-like aroma and pronounced acidity.
4. SL28 and SL34 – Both are common in Kenya, with SL28 being known for its bright acidity and SL34 being more resilient to varying weather conditions, both offering complex flavors.
5. Caturra – A mutation of Bourbon, it has a shorter stature making it resistant to wind and easier to harvest.

Each of these varietals brings its own taste profile and characteristics to the coffee they produce.

What are heirloom varietals?

Heirloom varietals are traditional coffee varieties that have been cultivated in the country of their origin for many generations and are considered native to the particular region. These are often found in Ethiopia, which is considered the birthplace of coffee, and they are known for their diverse and complex flavor profiles.

What does it mean when a coffee is labeled “single origin”?

When a coffee is labeled “single origin,” it means that all of the coffee beans in the bag come from one place, which could be a specific country, region, or even a single farm. This term is used to highlight the distinctive flavor profiles associated with coffee from a particular area and is often considered a mark of high quality.

How important is the coffee processing method to the flavor?

The way coffee beans are processed after being harvested has a substantial impact on the final flavor of the coffee. The three main processing methods are:

1. Washed (or wet) process, which typically produces a cleaner, brighter, and fruitier cup.
2. Natural (or dry) process, which often results in a sweeter, fuller-bodied coffee with more pronounced fruity notes.
3. Honey (or semi-washed) process, which can be seen as a middle ground between washed and natural, often leading to coffee that is sweet and smooth with a slight acidity and body.

The choice of process depends on the tradition of the region, the climate, and the desired flavor profile.

Are there any emerging coffee varieties or trends I should look out for?

Yes, the coffee industry is dynamic, with new varieties and trends emerging as growers innovate to meet consumer tastes and deal with challenges such as climate change. Trends such as the introduction of hybrid varietals for increased resilience, like the Castillo varietal in Colombia, or the move towards more experimental processing methods to create unique flavor profiles are gaining popularity. Specialty coffee enthusiasts are always on the lookout for the next unique varietal, such as the recent interest in the Pacamara or Maragogype varietals, known for their large bean size and exceptional flavors.