Seventeen Thousand Islands on the Ring of Fire: Why Geography Made Indonesian Coffee Special

If you set out to design the perfect place to grow coffee, you would struggle to beat Indonesia.

Start with the volcanoes. Indonesia sits on the Pacific Ring of Fire and has more active volcanoes than any other country. Every eruption, over thousands of years, has added minerals to the soil, which is why the ground here is so deep, dark and fertile. Coffee trees love it. The slopes also give arabica the altitude it wants. The Gayo Highlands sit at 1,200 to 1,700 metres, the Bajawa Plateau on Flores at 1,300 metres and above, and Temanggung sits between the twin volcanoes Sindoro and Sumbing.

Then there’s the equator, which Indonesia straddles. That means steady temperatures all year, no frost, and reliable wet and dry seasons, which is the rhythm coffee trees need to flower, fruit and ripen.

And then the part that makes Indonesia different from anywhere else. It isn’t one piece of land. It’s more than 17,000 islands spread over 5,000 kilometres, wider than the United States. Each coffee island, Sumatra, Java, Sulawesi, Flores, Bali, Papua, has its own soils, its own weather, its own rainfall, its own farming habits and often its own way of processing the beans.

The result is something no single country can usually offer. Indonesia isn’t one origin. It’s a dozen origins under one flag.

A Gayo coffee from the highlands of Aceh is heavy in the cup, earthy, with dark chocolate and a herbal depth. It tastes nothing like a Flores Bajawa, which is floral and sweet with a syrupy body. A Java arabica from Temanggung is somewhere else again: cleaner, brighter, with a rustic sweetness that comes from land farmed for three centuries. Same country. Completely different cups.

So it’s odd that Indonesian coffee usually turns up on a UK menu as one anonymous line, if it turns up at all. Nobody would write “European wine” and leave it there. The archipelago deserves the same respect for its regions that Burgundy and Barolo get.

That’s the standard we buy to. We work with named places: the Gayo Highlands in Sumatra, Temanggung in Java, the Bajawa Plateau and the Nola Wonga estate on Flores. The geography isn’t background information. It’s in the cup, and your guests can taste it.

Next week: the way of processing coffee that you’ll find almost nowhere else on earth, and why it gives Sumatran coffee its character.

BRUUK supplies single origin Indonesian coffee to hotels, members’ clubs and premium workspaces across the UK.

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