To study the effects of accelerated aging on seeds of Chir pine (Pinus roxburghii Sarg.) three seeds lots from different localities were subjected to AA at 41°C for 24, 36, 48, 60, 72, 96,and 120 hours. The AA time affected the three seed germination and PV significantly and all the three seed lots were found significantly different from each other. Moisture content of seeds continuously increased with increasing AA time Lot A had the highest vigor followed by lot B, while lot C was the lowest in vigor.