Most coffee grown at Aeroco is Robusta. The couple also runs a smaller Arabica plantation in Kon Tum, a couple of hours away, at a slightly higher altitude. Arabica plants need more elevation than Robusta bushes to grow well: at least about 800 metres (2,625 feet) above sea level, but preferably higher, up to 1,500 metres (5,000 feet). At such altitudes, the air is cooler, and the beans grow more slowly, which allows time to develop more flavour.