In this article unfolding processes of environmental governance are explored through the case of smart energy experimentation in Sweden. When experimentation merges with place-based dynamics, particular dispositions are shaped, with different implications for environmental politics. In accordance with other researchers’ findings it is illuminated how such dispositions tend to reinforce neoliberal environmental governance arrangements, whereas it is revealed how experimentation can also reconfigure governance. Attending to unfolding processes of accomplishing governance across a variety of spaces, this plasticity of experimentation is explored. The contribution consists of highlighting the situated dynamics playing out as environmental governance is produced across different places. This involves two analytical steps. First, disentangling some characteristics of experimentation as a situated disposition, through following how smart energy experimentation arranges environmental governance across the national Swedish energy and environmental policy landscape. The analysis highlights how particular characteristics of Swedish environmental governance molds experimentation into providing impetus for neoliberalization. Second, by zooming in two cases of experiments, elucidating the effects of the tentative and situated character of experimentation as governance is accomplished. Such analysis attends to the situated micro-politics of experiments, and how these can shape localized dispositions that refract broader neoliberal political rationality. Thereby the existence of a dominant ‘experimentation governmentality’, or disposition, is discovered, whereas situated experiments may always provide seedbeds of alternative forms of environmental governance due to experimentation’s plasticity.