This chapter examines the drivers and obstacles to Green Public Procurement (GPP) in Norway, given the considerable gap between ambition and implementation in this field. It critically examines the use of guidelines for procurers, a policy instrument for over 25 years, and evaluates the shift towards binding regulatory instruments. The chapter incorporates an analysis of Norwegian policy documents and research reports, with findings compared to general literature about GPP barriers and drivers. The chapter contributes in three ways. Firstly, it offers the Norwegian perspective on GPP, a system characterised by a significant proportion of decentralised procurement and a heavy reliance on soft coordination. Secondly, while focused on GPP, the chapter has broader relevance for Sustainable Public Procurement (SPP), which includes environmental, social, and economic value. Lastly, the assessment of Norway’s public procurement and GPP policy provides insightful recommendations for improving GPP uptake. The contribution highlights serious GPP implementation issues in Norway. Extensive guidance and tools offered as solutions show serious limitations and may inadvertently contribute to poor GPP implementation. The chapter concludes with policy recommendations, including awareness of the negative impacts of extensive guidance and standardisation, ensuring GPP covers all facets of public procurement, and integrating GPP with other policies and strategic uses of public procurement.