Today, 90 percent of Vietnam’s coffee is grown around Buon Ma Thuot, on the Central Highlands plateau, between 500 metres (1,640 feet) and 800 metres (2,625 feet) above sea level. Here, in every direction, vast fields of bright green coffee plants stretch into the horizon. In the autumn, the small cherries, which are about the size of grapes and grow in bunches, weigh down the branches and change from green to red – a sign that they are ready for harvest.