For many years, political scientists have debated over voter competence in direct democracy. At the core of the discussion is whether this central institution enlightens citizens about political facts. However, scholars have primarily examined if direct democracy fosters general political knowledge even though referendums and ballot initiatives are policy-specific in nature, as citizens vote on particular political proposals. By utilising a range of unique panel survey data collected around four Danish European Union referendums, I show that voters’ knowledge of policy-specific information markedly increased during the campaigns. I also combine the survey data with an original media content analysis and find that the learning of issue-specific facts is more related to the opportunities provided by the media information environment than to individual ability or motivation. These results suggest that a broad group of voters acquire policy-specific facts that help them make informed choices when they are granted full control of political decision-making.