Agricultural Training Centres (ATCs) promote crop and livestock development by providing extension information to farmers and serving as models of improved crop and livestock husbandry practices. Although potato farmers in Nyandarua County were trained on potato production technologies, their average yield was ≤ 16 tonnes per hectare compared to the national potential of 30 tonnes. This study therefore sought to determine the effectiveness of ATCs’ curriculum in promoting farmers’ adoption of selected potato production technologies in Nyandarua County in Kenya. A survey design was used. Primary data was collected from 136 farmers trained at ATCs on potato production using interview schedules. The respondents were sampled through a five-stage technique. The data was analysed using T-test and ANOVA, then summarized into percentages. Study results showed that adoption of recommended potato production technologies produced high yields compared to traditional technologies. It was therefore concluded that ATCs’ curriculum was effective in promoting farmers’ adoption of potato seed selection, planting, crop protection and harvesting technologies. It is recommended that ATCs’ curriculum prioritise demonstrations that show the influence of clean seed, fertilizer application, timely harvesting and spacing on potato yields. Further, campaigns should be held to educate farmers on the importance of potato dehaulming to promote its adoption. In addition, farmer-based seed production programs should be started in the County aimed at ensuring ready availability of seed.