Tea cultivation occurs in the highest altitude zones of Tharaka-Nithi County, typically above 1,800 meters where cool temperatures, high rainfall (1,800-2,500mm annually), and well-drained volcanic soils create near-ideal growing conditions for this perennial crop. Though smaller in acreage than miraa or coffee, tea generates significant income for growers and is an important component of the county's agricultural economy. Production is concentrated in the upper slopes of Mwimbi territory, particularly in zones adjacent to Meru County's tea estates and near the eastern edge of Mount Kenya National Park.
Tea was introduced to Kenya in the early 20th century, primarily on colonial estates in the Kericho and Kisii regions. Smallholder tea production in the central highlands developed more slowly, with significant expansion only from the 1970s onward. The Mwimbi zone began tea trials in the 1960s, and by the 1980s, several thousand hectares were under cultivation. The crop appealed to smallholders because it generates consistent income over many years, requires less labor than coffee per unit of land, and thrives in the highest rainfall zones. Processing and marketing were facilitated by state-backed tea boards and, later, by private tea factories and exporters.
Tea production follows a regular seasonal cycle. Young shoots are plucked every 7-14 days during the growing season, with yield declining during dry periods. Fresh leaf is transported to tea factories where it is withered, rolled, fermented, and dried before being sold in auction or directly to exporters. Quality depends on careful timing of picking and processing conditions. Most Tharaka-Nithi tea enters the auction system, with prices fluctuating based on global supply, quality grades, and geopolitical factors affecting tea imports in key markets. Kenya produces over 500,000 tons of tea annually and is among the world's largest exporters, with Tharaka-Nithi constituting less than 1 percent of national production but remaining locally significant.
The Mwimbi Tea Estate is among the largest commercial operations in the county, occupying several hundred hectares and employing hundreds of workers in plucking and factory operations. Several medium-scale estates also operate, and thousands of smallholders cultivate tea on landholdings of 0.25-1 hectare. Smallholder marketing occurs through farmer cooperative unions, which collect green leaf and coordinate sales, or directly to private tea factories. Cooperative systems provide extension support, credit access, and quality assurance, though they have been weakened by declining tea prices since the mid-2000s.
Climate change presents significant challenges for tea production in Tharaka-Nithi. Rainfall patterns are becoming less reliable, and rising temperatures are shifting the altitude zone where tea grows optimally higher up the mountain. Smallholders dependent on tea income have experienced declining revenues, and some have diversified into miraa or other crops. Water availability for irrigation and factory processing has become problematic during extended dry seasons, constraining production and quality.
See Also
Tharaka-Nithi County Chuka Mwimbi People Tharaka-Nithi Agriculture Tharaka-Nithi Climate Tharaka-Nithi Cooperatives Tea Production
Sources
- Kenya Tea Board. "Annual Tea Production Statistics by Region". Ministry of Agriculture. https://www.ktboard.or.ke/
- Ponte, Stefano. "Standards, Trade, and Equity: Lessons from Agricultural Value Chain Analysis". Journal of International Development, 2009.
- Wanjiru, Mary. "Women's Labor in Tea Production in Central Kenya". Feminist Economics, 2014.
- Ministry of Water. "Water Use in Tea Processing and Agriculture: Tharaka-Nithi County Assessment". Government of Kenya, 2018.