Among the various seed priming treatments KH2PO4 (1 %) is the suitable priming chemical to improve the marginal quality sunflower seed lots viz., germination ( %), speed of germination (), days to 50 % germination (), seedling length ( cm), seedling dry weight ( mg) and seedling growth ratio () compared to control ( %, , , 23 cm mg and respectively). Priming treatments are more effective in marginal seed lots compared to fresh seed quality. | Effect of priming on physiological seed quality in fresh and aged seeds of sunflower (Helianthus annuus L.) hybrid KBSH-53