Mutheka Coffee Farmers grow Arabica coffee. The following are the varieties grown; Sl28, Sl34, Ruiru 11 and Batian varieties.

The society currently produces 1.5 million kilograms, and is graded into the following grades; Parchment 1, Parchment 2, Parchment 3, Parchment     lights and Mbuni.


Mutheka coffee processing

Varieties: SL 28, SL34, Ruiru 11 and Batian

The society has about 1900 members. The farm land size ranges between 1.0 acres which can hold about 300 trees per farm. Processing consists of timely and selective hand picking is carried out at Kiandu wet mill. Cherry is delivered to the wet mill the same day it is picked.

Cherry sorting is carried out at the wet mill prior to pulping. Red ripe cherries are separated from underipes, overripe and foreign matter. Wet processing of coffee uses clean river water that is recirculated before its disposal into biodegradable seepage pits. Sun drying is done before delivery of the coffee to the dry mill for secondary processing. Mutheka society produces an average of 2.5 million kg cherry per year. The flowering season is usually between March and April, harvesting follows from between November and December.



Like SL28, Batian is tall statured, deep rooted with conical to cylindrical plant shape. Morphological characterization grouped Batian in the same cluster with SL28. The branching habit is erect at early stages but later becomes horizontal and tending to become semi-drooping or drooping after successive crop bearing seasons. Batian has long internodes on both the main stem and branches that compares closely to SL28. It produces many primary branches with average to profuse secondary branching, and remains green throughout the year under good management. The young leaves have medium anthocyanin coloration giving a bronze color but occasionally absent or weak, giving a green-bronze coloration. Mature leaves have medium width which compares closely with SL28. Ripe cherries are larger than those of SL28, elliptical in shape and deep red in color. Mature beans are large and bold; endosperm is green while the center cut is mostly singled and straight.


Agronomic Performance

Batian is resistant to Coffee berry disease CBD and Leaf Rust but other diseases should be controlled as recommended for other varieties. The cultivar has a potential of producing  up to 5 tons of clean coffee per ha (in a spacing of 2m x 2m) under good management judging from the third year yield obtained during the National Performance Trials where Batian produced 3.56 tons of clean coffee per hectare. Owing to its deep and extensive root system and resistance to CBD and Leaf Rust, Batian is suitable for all coffee growing zones.



  • Selected for its superior cup quality (although inferior to SL28)
  • Susceptible to coffee berry disease and coffee leaf rust



  • Excellent quality and good yields
  • Susceptible to coffee berry disease and coffee leaf rust


Ruiru 11

  • Ruiru 11 was released in 1985 by CRF Kenya
  • Resistant to CBD and CLR
  • Compact in nature hence more trees per acre
  • Comes to production within 18 months
  • High yields and good quality