The article presents the results of a three-year study on the effects of sowing dates on the productivity of winter wheat varieties under the conditions of the Northeastern Forest-Steppe zone of Ukraine. The study assessed plant height, productive tillering capacity, number of grains per spike, grain weight per spike, and 1000-grain weight for the Podolianka, Bohdana, Zdobna, Harmonika, and Pylypivka varieties. The first factor analyzed was plant height, which reflects the development of vegetative biomass and is an important indicator of yield formation and lodging resistance. It was established that the Podolianka variety exhibited stability across most parameters under different sowing dates. In contrast, Bohdana was sensitive to optimal sowing times (September 10), at which it reached maximum performance. The Zdobna variety showed variability but achieved peak values at medium-late sowing dates (October 10). Harmonika demonstrated the lowest plant height yet maintained stable tillering and grain weight indicators. The Pylypivka variety stood out for its highest adaptability and stability across all studied parameters, even under late sowing conditions. The study results highlight the importance of considering varietal characteristics and sowing dates to achieve high yield and grain quality, which is critical in introducing new varieties and improving crop management practices.