IT organisations are increasingly called on to contribute to organisational goals for environmental sustainability. To do so, they first need to be aware of why they should “Green IT” as well as understand what it is they need to know and how they can embed this knowledge throughout the organisation. This paper reports a contextualist analysis of six case studies to unravel the why, what and how of Green IT learning. Findings indicate that the multi-disciplinary nature of Green IT necessitates access to a wide-range of knowledge sources, top-down and bottom-up approaches to learning and the creation of space for a Green IT dialogue. The use of crowd sourcing and innovation farming to integrate individual learning to the group and organisational levels was also evident.