What is the SL28 variety known for?
The SL28 variety is world-renowned for its exceptional flavor profile, characterized by intense, bright acidity, complex fruit notes, and a blackcurrant-like sweetness. Developed in Kenya, this cultivar is a cornerstone of the country's industry and is highly prized by roasters and consumers alike for its ability to produce a vibrant, high-quality cup.
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The SL28 variety is a testament to the success of mid-20th-century agricultural research. Developed by Scott Agricultural Laboratories (SL) in Kenya during the 1930s, it was specifically bred to thrive in the country's unique climate and to produce a high-quality cup. Its success was so profound that it became the standard for Kenyan coffee, setting the benchmark for what the world expects from the region.
What makes SL28 so special is its genetic makeup, which includes a mix of Bourbon and other varieties. This combination results in a plant that is not only resilient but also capable of producing beans with a distinct, high-acidity profile. The 'SL' in the name stands for the laboratory where it was developed, and the '28' refers to the specific selection number. It is often noted for its deep, wine-like acidity and notes of blackcurrant, citrus, and stone fruit.
Despite its popularity, SL28 is not without its challenges. It is susceptible to certain coffee diseases, such as Coffee Berry Disease (CBD), which has led to the development of newer, more resistant varieties like Ruiru 11 and Batian. However, many farmers and roasters continue to prioritize SL28 because of its unparalleled flavor profile, which remains the gold standard for many who love Kenyan coffee.
For the reader, encountering an SL28 on a bag of coffee is a reliable indicator of quality. If you enjoy coffees that are bright, complex, and have a 'sparkle' on the palate, SL28 is a variety you should actively seek out. It is particularly well-suited to light and medium roasts, which preserve the delicate acidity and fruit notes that define the variety.
In practice, SL28 is a coffee that rewards careful brewing. Because of its high acidity, it can be unforgiving if under-extracted, leading to a sour or sharp taste. Aim for a slightly longer contact time or a finer grind to ensure you are fully extracting the sweetness that balances the acidity. By understanding the characteristics of SL28, you can better appreciate the craftsmanship that goes into producing some of the world's most celebrated coffees.
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