The introduction of improved maize ( Zea mays
L.) varieties has met with only partial success, as measured by rates of adoption. As such, efforts have been made by International Institute of Tropical Agriculture (IITA) to accelerate the process of maize seed adoption in Africa, through learning sites including the Kano-Katsina-Maradi (KKM PLS) in West Africa. The objective of this study was to ascertain the degree of success and factors affecting the adoption of improved maize seed varieties in the KKM PLS. The study used data from a midline survey sample of 1,800 households in 180 villages in the study area. Tobit regression model was used to identify the degree and characteristics important for adoption of improved maize seed varieties. Results indicated that affordability, knowledge on use and suitable packaging of technology were important adoption determinants. Other factors were gender, total farm size and extension agent visits. Households with older and more educated heads were also significantly more likely to adopt technologies.