Processing Methode of Sumatran Coffee


Ever since people tasted Sumatran coffee, it was always processed as semi-washed rather than fully washed. In Indonesia, Semi washed is usually called as “giling basah” or “wet hulled”. A fully washed process coffee is usually characterised as having clean cup but the processing mechanism does not satisfy the ‘expected’ cupping profile of Sumatera Coffee. This is because people would expect Sumatran coffee to have earthy flavour with chocolaty roast notes. These flavours are developed based on a combination of altitude, climate, soils and the way coffees are processed after the red cherries are picked. The earthy flavour with chocolaty roast notes came more clearly when it is wet hulled. Majority of traditional farmers do not have the facility to perform fully washed processing method therefore they only use traditional pulping equipment for generations to carry out wet hulled processed coffees.

  • Wahana Luwak

    Luwak has been known to eat only the very ripe and the best coffee cherry. The cherry is then eaten, then gone through natural fermentation in its stomach to produce a unique character unlike other coffee.

    Wahana Long Berry

    Longberry variety is said to be name after its appearance. The size of this Wahana Longberry is relatively long and thin in comparison with other variety. Longberry variety was thought to be originated from Ethiopia because of its similarity to Longberry harrar (a natural mutation from Typica variety). In Indonesia, Longberry was known to be grown only in Aceh but years ago we decided to bring the coffee to Lake Toba area and grow it in our own farm for trial. Today we are pleased to find that it developed a profile that is unlike the Aceh Longberry.

    Wahana Rasuna

    Rasuna is told to be a hybrid between Catimor (HDT & Caturra cross) and Typica originated in Sumatra. Catimor is known for its disease resistance but has a shorter life span of about 10 years however Typica was known for its low yield but much longer lifespan. Combining the two varietals was aimed to retain yield as well as production lifespan therefore Rasuna varietal is created. Rasuna is one of the most popular cultivar that is planted in Sumatera. Rasuna is planted in Wahana as a control (to see how other variety ranks up to it). Furthermore we are also keen to unlock its full potential as a result of cultivated in a conducive environment.

    Wahana S795

    S795 varietal or also known as Selection 795, it was thought to be the cross of S288 (natural hybrid of Liberica and Arabica) and an old kent variety ( a Typican variety that has adapt to India condition). It is most commonly planted Arabica coffee in India and Southeast Asia. Commonly known as "Jember" by Indonesians, S795 was one of the major varietal that is grown in Sulawesi. For ages, Sulawesi coffee or Kalossi Coffee has been mention when people discussed about Indonesian coffee. In 2007, we decide to be the first to plant the S795 in North Sumatera and we are very curious to try how the taste will be.

    Wahana Caturra

    Caturra varietal is first discovered in Brazil, it is said to be the natural mutation of Coffee Bourbon. In Brazil, it does not grow as well as it is in Costa Rica therefore it is well known as a Costa Rican Variety. Caturra is quite a unique coffee that requires a lot of care and fertilization thus it was planted in Wahana estate in 2008. We are very keen to see how well will Caturra variety adaptation to Indonesia climate and how the taste will be.

    Wahana HDT

    HDT which stands for Hibrido de Timor is also known as “Tim Tim”. Tim Tim in Indonesian stands for Timor Timur (East Timor in English), used to be the 27th province of Indonesia before it declared its own Independence country as Timor Leste.

    HDT is a cross between Arabica and Robusta. It was first collected in East Timor in 1978 and planted in Aceh in 1979. HDT varietal was brought in to Wahana Estate in 2006 and it was first harvested in 2009.

  • Wahana Catuai

    Catuai varietal which is known as a hybrid of Mundo Novo (Hybrid between Typica and Bourbon) and Caturra (Mutation from Bourbon) originated in Brazil. Catuai variety tends to presents a more Bourbon character which is shorter but need more care. Interestingly Catuai varietal is well known to come from Costa Rica as this is area is producing most of Catuai varietal coffee. Nevertheless, the Costa Rican coffee that customer received are usually a mixture of various varieties. Wahana Catuai will let you understand how a single variety tastes like but with a touch of Sumateran body.

    Wahana Toraja

    Toraja is named after a region in Sulawesi popular for growing coffee called Tana Toraja (means Land of Toraja). Wahana Toraja is a special selected variety that was thought to be a natural mutation from Typica variety. Typica variety was one of the first varieties that the Dutch introduced to Indonesia but mostly was destroyed by the coffee rust disease. This variety was planted in Wahana in 2007 so as to observe its suitability, adaptability and taste which were hope to develop interestingly.

    Wahana Villa Sarchi

    Villa Sarchi is a dwarf mutation of Bourbon varietal. Villa Sarchi varietal is unique to Costa Rica that was found in small town of Sarchi.

    Western Valley region of Costa Rica accounts for approximately 25% of coffee production. This area produces the very finest coffee in the country. Most Villa Sarchi coffees are grown in this region.

    Wahana Jantung

    Wahana Jantung varietal originated from Aceh region in Sumatra. The word "Jantung" in Indonesian means "Heart", as the green coffee beans looks like the shape of heart to the natives. During Dutch colonization, Dutch brought in Typica varietal to Lake Tawar region and plant it there. Since then this Typica varietal seed is known as Jantung and widely grown in Aceh region. In 2005 Wahana Jantung varietal was brought into Wahana nursery and then planted in 2006 in Wahana Estate coffee growing region.

    Wahana USDA

    Wahana USDA varietal was brought to us from the Indonesia Coffee and Cacao research institute. USDA has been one of their collections of coffee varietals in their coffee gene pool. Stories were that this variety originates from an Ethiopian line that was brought to Indonesia from Ethiopia. USDA was more commonly found to be grown in Java region and a little in Aceh.

    Wahana Andong Sari

    Wahana Andong sari was an Indonesian varietal that was released by the Indonesian Coffee and Cacao research institute. It is selected from a popular Catimor that was brought from Colombia to Indonesia. Andong sari was thought to be a hybrid cross from Catimor, Caturra and Hibrido de timor (HDT) so as to give resistance to leaf rust which wipe out the entire typica variety in Indonesia coffee industry in the 1880’s. Futhermore, this variety also has a resistance against two major nematodes problem and boost production yield. Andongsari was mainly grow in East Java region and a little bit in Lintong region.

  • Wahana Gayo Toba

    Gayo Toba is named after a coffee variety P88 that was found in Gayo (takegon) and grown in Lake toba region in North Sumatera. Wahana Gayo Toba is a special selected variety that was thought to be a selection line of catimor that was brought to Aceh.

    P88 variety was one of the varieties that the Dutch introduced to Indonesia from Colombia and show quite a good adaptability in Indonesia. This varietal was also researched by ICCRI to find that it has uniform beans, high production and superior taste. This variety was planted in Wahana in 2011 so as to observe its suitability, adaptability and taste which were hope to develop interestingly.