Giant panicum (Panicum maximum) is a tall, vigorous perennial grass that is native to tropical and subtropical Africa. It is drought-tolerant due to its deep and dense fibrous root system and grows in a wide range of soil types. It is an important livestock feed and has been extensively cultivated in Brazil (Santos et al. 2006). Despite its wide genetic diversity in East Africa, its potential for livestock feed has not been exploited there due to limited research. Our study aimed at evaluating the production of several giant panicum ecotypes in a range of environments in semi-arid areas of Kenya.