Gathaithi Farmers’ Cooperative Society was registered under the Cooperative Society Act of 2000. It was formerly part of the Giant Tetu Coffee Farmers' Society. This cooperative has only one factory – Gathaithi Coffee Factory. Currently, it has 1,656 active members. The cooperative is located at Gaki location, Gathaithi sub-location,Tetu sub-county in Nyeri County. Gathaithi farms have two cropping seasons: late crop starting at the end of September to mid-January contributing 70%, and early crop starting from April to July and contributing 30% of the total annual production. The members of the Gathaithi cooperative grow mostly the SL 28 and SL 34 with only a small percentage of Ruiru 11 and Batian.
Harvesting is carried out by careful hand selection when the coffee cherries are perfectly ripe and is delivered to the Gathaithi wet mill the very same day. Cherry sorting is carried out to ensure only the very best cherries are used and inferior quality cherries removed After pulping, the coffee is fermented overnight to break down the sugars, before traveling through channels to the soaking tank where the coffee is carefully cleaned, soaked and spread out on the raised drying tables. Time on the drying tables depends on climate, ambient temperature and total production volume undergoing processing. Drying can take from 7 to 15 days in total. Continuous sorting and hand turning of the parchment takes place throughout the drying process.