‘Green economy’ is a broad concept open to different interpretations, definitions and practices ranging from the greening of current neoliberal economies to radical transformations of these economies. In Africa, one emerging and powerful idea in the implementation of the green economy seems to be to use a green agenda to further strengthen development as modernization through capital-intensive land investments. This has again reinvigorated old debates about large-scale versus smallholder agriculture. Influential actors justify large-scale ‘green’ investments by the urgency for economic development as well as to offset carbon emissions and other environmental impacts. In this contribution, we discuss the case of the Southern Agricultural Growth Corridor of Tanzania (SAGCOT) to give examples of how the green economy may materialize in Africa. SAGCOT is presented by the Tanzanian government as well as investors and donors as a leading African example of an ‘investment blueprint’ and as a laboratory to test green growth combining profitable farming with the safeguard of ecosystem services. In particular, we discuss three Scandinavian investments within SAGCOT, their social implications and their discursive representations through the public debates that these investments have generated in Scandinavia.