Purpose: To identify and review production and marketing information sources and flows for smallholder cashew (Anacardium occidentale L.) growers in Tanzania and recommend systems improvements for better technology uptake. Design/methodology/approach: Two-stage purposive samples were drawn. First, two districts in the main cashew producing areas, one with significant research investment and good marketing infrastructure and the other a counterfactual. Second, two villages were purposively selected from each district to provide the maximum contrast of variables pertinent to the study. Field data were collected using a semi-structured, open-ended questionnaire complimented by field verification and a wrap-up stakeholders' workshop. The data were analysed using chi-square test and the orderly probit model. Findings: Sources of information and flows varied between districts and villages. For production, the most reliable sources were role model farmers (RMFs), extensionists, radio, on-farm demonstrations, researchers, cashew development centres (CDCs), print media and mobile phones in order of popularity. RMFs, radio programmes, extensionists, interactions with researchers, CDCs and print were the main pathways. For marketing, primary society notice boards, radio announcements, RMFs, extensionists, mobile phones and print were listed in order of popularity. Print media was the least popular due to a low level of literacy among growers. RMFs were popular actors in the information systems irrespective of social-economic background. Practical implications: Policy change and additional resources are required for improvement of existing information systems. Additionally, incentive structures that will enhance and sustain continued investment in cashew production should be emphasized. Originality and value: This is the first attempt in the Tanzanian cashew sector to analyse and link social economics of growers with information sources, communication channels and technology uptake. (Contains 7 figures, 4 tables and 1 note.)