How Does a Natural Process Change Mandheling Flavor?
Sumatra Mandheling is usually wet-hulled, but Wahana Estate in the Sidikalang region west of Lake Toba produces a natural-process Mandheling using the Rasuna variety, a hybrid of Catimor and Sumatran Typica. Planted at 1300 to 1500 meters under full shade, it cups with peach, watermelon and citrus aromas plus a creamy, cocoa-like body.
Wahana Estate was established in 2005 and separates varieties across its land, with this natural lot coming from a 90-hectare block. The estate mostly produces washed coffee, making the dry-process Rasuna an exception in the region. Slower growth under shade contributes to floral notes and strawberry sweetness alongside the cocoa body.
In Sumatra, Indonesia, the wet-hulled process is almost synonymous with Mandheling, yet the natural process at Wahana Estate breaks this convention. This coffee uses the Rasuna variety—a hybrid of Catimor and native Sumatran Typica—planted in the Sidikalang region west of Lake Toba, at an altitude of 1,300 to 1,500 meters, grown slowly under full shade. In November 2013, we first encountered this batch of naturally processed beans, which presented aromas of peach, watermelon, and citrus, along with a creamy, cocoa-like full body, accompanied by floral notes and strawberry sweetness. This article will comprehensively analyze the allure of this unique natural-process Mandheling, from the estate's background, variety characteristics, processing methods to cupping performance, and include Front Street Coffee's recommendation reasons.
About the Natural Process of Sumatra Wahana
Arrived in November 2013. By the following year, Sumatra Wahana Estate became the first naturally processed coffee we had tasted from this region in Indonesia, and it was indeed not a common local practice. What we usually see are mostly wet-hulled coffees like Mandheling or Lintong. But one day, an importer we work with called, saying they had reserved a coffee that was one of the best ten they had tasted last year. We sent out flyers and purchased some conditionally. This bean had just appeared recently, and it was really interesting to drink, especially when you consider it as a regional anomaly.
Wahana Natural comes from the Sidikalang region of North Sumatra, located west of the volcanic lake Toba. Wahana Estate is large but meticulously managed, an experimental property where they separate different varieties, some of which are hybrids unique to Indonesia. Most of the estate's production is washed coffee, and they have invested heavily in the region. However, this particular coffee is dry-processed and belongs entirely to the Rasuna variety, a hybrid of Catimor and Typica originating from Sumatra. This new variety is planted in Wahana's 90-hectare Taken area. The variety grows between 1,300 and 1,500 meters in the Wahana region, with all trees under shade, allowing for slower, more natural growth.
Industry Name: Wahana Coffee Estate
Established: 2005
Location: Sidikalang region of North Sumatra
Altitude: 1,300 - 1,500 meters (4,250 - 5,000 feet)
Variety: Rasuna
Grade: 1
Processing Method: Natural Sun-Dried
The plantation states that they follow organic and Rainforest Alliance practices, but currently neither is certified. The certification process can take a long time, so for now this cannot be considered official certification, but rather a sign of the plantation's intentions. We mentioned that Wahana is experimental, so if interested, they also grow some "international seedling varieties," such as Villa Sarchi, Caturra, and Catuai from Costa Rica, as well as Typica from Colombia. These are additions to the local varieties and hybrids like this Rasuna.
Cupping Characteristics: Aromas of peach, watermelon, and citrus. The creamy, cocoa bean texture has the full body characteristic of Sumatra, but the processing and variety selection add a lot of intrigue. You will smell some floral notes, sweet dry fragrance, and strawberry flavors. This is a unique coffee; a single tasting might be an experience of a new variety paired with an unusual processing method, bringing novelty to the region. Front Street Coffee recommends this natural-process Mandheling, suitable for enthusiasts seeking differentiated flavors.
The above content is compiled by CoffeeHunters, a coffee news website.
