Broomcorn millet (Panicum miliaceum L.) was first domesticated in China and dispersed westward via Central Asia in the 3rd millennium BC, reaching Europe in the 2nd millennium BC. North of the Black Sea, the North Pontic steppe and forest-steppe areas are key regions for understanding the westward dispersal of millet, as evidenced by the earliest direct radiocarbon dates on European millet grains, which we present here. Examining various lines of evidence relevant to crop cultivation, animal husbandry, contacts and lifestyles, we explore the regional dynamics of the adoption of millet, broadening knowledge about past subsistence strategies related to the ‘millet farmers/consumers’ who inhabited the northern Black Sea region during the Bronze and Iron Ages. Our re-evaluation of crop evidence contributes to ongoing discussions on the mobility of prehistoric communities in the Eurasian steppe and forest-steppe—for instance, on whether millet was linked to full-time mobile pastoralists, who occasionally grew or only consumed it, or whether it was linked to sedentary farmers and cattle herders who regularly cultivated millet, among other crops. From the Bronze Age to the Late Antique, this crop is attested under different socio-cultural conditions that suggest it was adaptable to stockbreeding and the natural environment and consumed since the mid 2nd millennium BC in the northern Black Sea region.