SL-34 are well-known Kenyan coffee varieties and quickly became the varieties of choice for most growers. The Western region offers fertile soils and consistent rains every year and thus produces some of the best Kenyan coffee beans. Here are several coffee farmers in Eldoret, Bungoma, Kakamega, and Vihiga. The high growing altitudes mean that the beans grow slower than at low altitudes, providing more nutrients and allowing them more time to develop their flavors and mature.