SL28 (variety, Kenya)

SL28 is an Arabica variety selected by Scott Agricultural Laboratories in Kenya in 1931 from a drought-resistant Tanganyika Bourbon (now Tanzania). It produces large, elongated beans at high altitude (1,500-2,100 m) and is responsible for Kenya's signature blackcurrant, grapefruit, and tomato acidity. SL28 is highly susceptible to coffee leaf rust and CBD (coffee berry disease), making it economically risky but sensorially exceptional. It commands the highest premiums at the Nairobi Coffee Exchange.