Sơn La

The northwest

Sơn La is in the northwest, about 1,200 km from Buôn Ma Thuột and much closer to Laos and the Chinese border than to the Central Highlands. The landscape is limestone karst rather than basalt plateau: steep, grey, folded, with coffee planted on terraces cut into slopes that would be considered unfarmable elsewhere.

It is also cold. Winter temperatures drop low enough that frost is a real annual risk, and a hard frost can kill young trees outright. That is an unusual thing to say about anywhere in Vietnam.

Why arabica works here

Arabica wants cool nights and a slow ripening cycle. In the Central Highlands you need altitude to get that, and most of the land is not high enough.

Sơn La gets it from latitude instead. At around 21°N with elevations of 900 to 1,200 metres, the climate does what 1,500 metres does further south. The ripening season is long, and the harvest runs earlier than in the Central Highlands: usually October through December, starting in late September in some years, against November through January.

Who grows it

Thái and H’Mông households, mostly on small terraced plots. Coffee here is frequently one crop among several, grown alongside maize, fruit and livestock.

The variety is overwhelmingly Catimor, planted for its resistance to coffee leaf rust, which is a serious problem in a humid mountain climate.

What it tastes like

Sơn La arabica is commonly described as red fruit, honey and tea-like, with a gentle acidity: softer and less bright than Đà Lạt, and often delicate.

The “tea-like” descriptor comes up often in Vietnamese cupping notes, and it doubles as a warning. Brewed the way Central Highlands robusta usually is, as a small, concentrated phin often finished with condensed milk, a coffee described that way is likely to have its delicacy buried under strength and sweetness.

How to brew it

Skip the 1:5 phin. If you must use a phin, go to 1:8 or wider and use water close to the boil.

A pour-over at around 1:16 suits it better. Treat it like any other washed high-grown arabica.

Frost, prices and fruit

Sơn La’s arabica area has fluctuated significantly over the years. Frost events, price swings and competition from other crops, particularly fruit, which the province has pushed hard, all move farmers in and out of coffee.

It is a small and somewhat fragile origin, which is part of why a bag of it is hard to find.