Increase in aging period from two to six days delayed the days to 50 per cent flowering, reduced the germinability, plant height, dry matter production, head diameter, test weight and the yield significantly when four sunflower F₁ hybrids were subjected to artificial aging (100 per cent RH and 42 ± 2° C temperature) and sown in the field. In other laboratory study, field emergence of the seed lot was significantly positively corelated with the standard germination, root-shoot length, vigor index, seedling growth rate, speed of germination and negatively with electrical conductivity of seed leachate exhibiting their equal function in forecasting the stand establishment of the crop.