Archaeobotanical analysis of the Iron Age layers from unit B 8/10 in the settlement at the Nadin–Gradina site includes a macrobotanical analysis of the sediment, which is accompanied by an analysis of macrobotanical remains from ceramic fragments from layer 419. Carbonized and mineralized plant remains, as well as plant impressions on ceramics, were isolated. The great number of large-grained cereals (Cerealia) and their occurrence in all layers indicate that they were staple foods. Although most of them are in fragmented form, whole seeds were also detected. Barley (Hordeum vulgare) and its three subspecies were identified: two-rowed barley (Hordeum vulgare var. distichum), four-rowed barley (Hordeum vulgare var. tetrastichum), and six-rowed barley (Hordeum vulgare var. hexastichum). Four types of wheat were recorded: Einkorn wheat (Triticum monococcum), Emmer wheat (Triticum dicoccum), spelt wheat (Triticum spelta), and durum wheat (Triticum durum group) in two varieties: lax-eared and dense-eared. Small-seeded cereals, broomcorn millet (Panicum miliaceum) and foxtail millet (Setaria italica) were also recorded, but in smaller quantities compared to large-grained cereals. Cultivation of large-grained cereals at the site was confirmed in the Early Iron Age by finding traces of grain threshing remains on locally made ceramic fragments, while small-seeded grains were most likely cultivated as needed, but were not dominant in the diet, as confirmed by isotopic analyses, which may point to their use for other purposes. A variety of weeds and ruderal plants were also detected, among which stands out the ryegrass (Bromus secalinus), which was difficult to remove by threshing, which is why it was re-sown but also consumed. Legumes such as lentils (Lens culinaris), broad beans (Vicia faba), and bitter vetch (Vicia ervilia) were also identified, although in very small quantities. They were found in storage contexts together with cereals, which suggests that they were cultivated and consumed. Various woody plants such as grapevine (Vitis vinifera), olive (Olea europaea), fig (Ficus carica), acorn (Quercus sp.), cherry (Prunus avium), blackthorn (Prunus spinosa) and dogwood (Cornus mas) were also identified, which testifies gathering activities in the vicinity of the settlement. While for the vine, considering the frequency of finds and the greater number of fragments, it can be assumed that cultivation began already during the Early Iron Age, and for the olive only from the Late Iron Age. By combining the data of the conducted analyses, we obtained a broader picture of economic practices and vegetation in the surrounding area.