Yield attributes in different wheat genotypes were monitored under the influence of three Planting windows. The field experiment was carried out at National Agricultural Research Center (NARC), Islamabad, Pakistan during Rabi season 2021-22, to study the effect of three sowing dates 25^th November, 10^thDecemberand 25^thDecemberon different genotypes of wheat. Sowing dates significantly affected the number of fertile tiller m^-2, plant height, spike length, 1000 grain weight and grain yield. In case of planting window, significantly maximum grain yield obtained was5587.8 kg ha^-1when crop was sown on 25th November against minimum grain yield 4480.5 kg ha^-1 in case of late sowing while maximum numbers of tillers were observed in NR-546 and minimum number of tillers were obtained in Markaz-2019. The overall findings concluded that the effect of sowing dates was significant as early and late sowing of the crop as it directly effects on yield attributes.

Key words: Sowing dates, tillers, yield, wheat, genotypes