This paper explores the regulatory regime for ocean fertilization under the dumping regime, which comprises the 1972 London Convention and 1996 Protocol. It assesses the extent to which ocean fertilization is presently subject to mandatory and voluntary controls and provides an overview of the proposals currently under active consideration designed to develop a comprehensive regime for ocean fertilization. Whilst acknowledging the benefits of regulation and the importance of environmental protection, this paper concludes with a warning against considering ocean fertilization in isolation from the broader context of geoengineering and climate change more generally.