Citizens are called upon to become active participants in creating a more sustainable food system. As food citizens, people participate in defining and constructing their food systems according to their needs and values. In food policies, the concept of food citizenship is often left undefined or with reference only to individual activities. In the food citizenship literature, the role of nonhuman agency in constituting food citizenship needs more examination. Here we investigate food citizenship activities in a citizen-led community-supported agriculture group and explore the role of materiality in constituting food citizenship. We ask (1) what is the role of material-discursive arrangements in community-supported agriculture activities, and (2) how does materiality constitute food citizenship? We analyze semi-structured interviews, as well as observation and visual material, using qualitative content analysis. Our findings indicate that materialities, such as the field, time, and body, play a central role in community-supported agriculture activities. With materialities, food citizenship is understood as collective and active doing, aiming to change the food system. Instead of endorsing food citizenship as a human trait or status, we claim that it is more productive to regard it as a phenomenon, produced in intra-action with(in) material-discursive arrangements. Acknowledging nonhuman agency emphasizes the political, collective, and responsible nature of citizenship as well as the power relations behind the constitution of citizenship. We conclude that in food policies more attention should be paid to collective ways of civic participation and to the materiality of becoming a food citizen.