The Tambaya Factory was established in 1982 and serves over 1,000 smallholder farmers among five villages in the Nyeri district. Most producers here cultivate an average of 250 coffee trees each on their small family farms. The terroir is influenced by the fertile red volcanic soil found among the foothills of the Aberdare Ranges and Mount Kenya, nurtured by warm days and cool nights.
The Tambaya wet mill, named after the indigenous Mutambaya tree, is one of eight mills operated by the Rumukia Farmers’ Cooperative Society. The cooperative is committed to improving the lives of its members and the quality of their coffee through agricultural training and education.
During the harvest season, farmers handpick the ripest cherries and deliver them on the same day to the Tambaya mill. At the mill, cherries are repeatedly sorted, pulped, fermented, and fully washed to remove all traces of fruit mucilage. This coffee, featuring Kenya’s classic SL28 and SL34 varieties, was sun-dried on raised beds for two to three weeks until an optimal moisture content of 10-12% was achieved.