Source: http://www.chinadaily.com.cn/regional/2010-05/03/content_9811797.htm

Tea is a major cash crop that is grown in Kenya. Kenyan tea has been the leading major foreign exchange earner for the country.  Most tea produced in Kenya is black tea. Kenya's tea growing regions are endowed with ideal climate, tropical and volcanic red soils, and well distributed rainfall throughout the year.  There are 49 varieties of tea developed in Kenya. In most tea growing regions labor is manual and this opens up seasonal employment to many people.