This document discusses public-private partnerships (PPPs) for irrigation development in Africa. It describes a collaborative research project assessing PPP models in Ghana and Tanzania. PPPs are promoted as a way to reduce government costs and bring in private expertise, but little is known about their actual impacts. The document examines two case studies of PPP irrigation schemes in Tanzania, finding challenges including land tenure issues, price volatility, and differing perspectives between groups. Key challenges for PPPs identified are balancing profit and development goals and ensuring inclusion of farmers, communities, and markets.