What is the SL34 coffee variety?

The SL34 variety is a legend in the world of specialty coffee, particularly for those who love the bright, intense profiles of Kenyan beans. Developed by Scott Agricultural Laboratories (SL) in the 1930s, the 'SL' series was part of a government-led effort to identify and propagate the best-performing coffee trees in Kenya. SL34 was selected for its superior cup quality, which is characterized by a complex, wine-like acidity and a rich, syrupy body.

What makes SL34 so special is its ability to express the unique terroir of the high-altitude regions where it is grown. It is often described as having notes of black currant, citrus, and stone fruit, making it a standout in cupping competitions. Because of this, it is highly sought after by specialty roasters who want to showcase the best that Kenyan coffee has to offer. It is a variety that demands attention and rewards the drinker with a truly memorable experience.

However, like many of the older, high-quality varieties, SL34 is not particularly resistant to pests and diseases. It requires careful management and a favorable climate to thrive. This has led to a decline in its prevalence in some areas, as farmers have shifted toward more resilient, though often less flavorful, hybrids. Despite this, the demand for SL34 remains strong, and many farmers continue to cultivate it because of the premium prices it commands in the specialty market.

In the field, SL34 trees are known for their vigorous growth and high yield, provided they are given the right conditions. They are well-suited to the volcanic soils and high altitudes of Kenya, which contribute to the development of the complex flavor compounds that define the variety. For the consumer, SL34 is a hallmark of quality. When you see it on a bag, you can expect a coffee that is vibrant, complex, and deeply satisfying.

In practice, SL34 is a testament to the importance of variety selection in coffee production. It shows that while agricultural efficiency is important, the pursuit of flavor is what truly drives the specialty coffee industry. By preserving and cultivating varieties like SL34, farmers and roasters are ensuring that the diversity of coffee flavors continues to thrive, providing us with the incredible range of experiences we enjoy in every cup.