In order to determine the breaking of dormancy and The amount of after repining two populations of Winter cherry (Physalis sp) as weed of sugar beet fields, a factorial experiment was conducted in a completely randomized design(CRD) with three replications at Khuzestan Agricultural science and Natural Resources University in 2018. The first factor including time of after ripening (0, 14, 28, 35, 42, 49, 56 and 63 days after separation of berry fruit) and the second factor of seed priming (without priming, gibberellin 1000 ppm and potassium nitrate 2000 PPM) and the third factor were two populations of Winter cherry (Fars and Lorestan). between the two species collected from Fars and Lorestan Significant differences were observed. in Fars population, in non-priming conditions after 35 days’ separation of berry fruit, germination was 98%, while in Lorestan less than 50%. In non-priming conditions, population of Lorestan had more than 90% germination 65 days after separation of berry fruit. application of gibberellin (1000 ppm) and potassium nitrate (2000 ppm) in two populations led to an increase in germination percentage, so that in two populations the percentage of germination was more than 98% two weeks after separation of berry fruit, Application of gibberellin compared to potassium nitrate led to an increase in the rate of germination in the two populations. Generally, the amount of dormancy and after ripening in Lorestan was higher than the Fars population.