What is the SL34 variety?
SL34 is a highly regarded Kenyan coffee variety selected by Scott Agricultural Laboratories in the 1930s. It is famous for its complex, citrus-like acidity and heavy, syrupy body. While it is not disease-resistant, its exceptional cup quality makes it a favorite among specialty roasters and farmers in high-altitude regions.
The SL34 variety is one of the most iconic cultivars in the world of specialty coffee, particularly for those who love the vibrant, high-acid profiles of Kenyan beans. Like its sibling, SL28, it was selected at the Scott Agricultural Laboratories in Kenya during the 1930s. The 'SL' prefix stands for Scott Laboratories, and the number 34 refers to the specific selection number from that era. It was chosen for its superior cup quality and its ability to thrive in the specific microclimates of Kenya's high-altitude regions.
What sets SL34 apart is its sensory profile. It is widely celebrated for a deep, complex acidity that often reminds tasters of black currant, citrus, or stone fruits, paired with a rich, heavy mouthfeel. This combination of high acidity and substantial body makes it a standout in cupping sessions. However, this quality comes with a trade-off: SL34 is not particularly resistant to common coffee diseases like coffee leaf rust or coffee berry disease, requiring farmers to invest more in crop management and protection.
In practice, SL34 is often found in high-quality Kenyan lots, frequently blended with other varieties to create the classic 'Kenyan AA' profile. For the home brewer, SL34 is a treat that rewards precise brewing. Because of its intense acidity, it can be challenging to dial in, but when done correctly, it offers one of the most rewarding experiences in coffee. Its enduring popularity is a testament to the fact that, in the specialty world, flavor often takes precedence over ease of cultivation.
- · https://varieties.worldcoffeeresearch.org/varieties/sl34