Species composition and the dominant role of certain weeds in spring triticale fields located in the Eastern Forest-Steppe of Ukraine were determined. Weeds were represented by 71 species. Early spring weeds such as Chenopodium album L., Stachys annua L. and late spring weeds such as Setaria pumila (Poir.) Schult., Echinochloa crus-galli, Amaranthus retroflexus L. were categorized as extremely widespread. Early spring weeds such as Polygonum lapathifolium, Fallopia convolvulus; late spring weeds such as Solánum nígrum; and soboliferous weeds such as Cirsium arvense L., Convolvulus arvensis L. were categorized as widespread weeds in triticale