Studies on the effect of seed priming with water, 1% KH2PO4, 3% KNO3 and 2% CaCl2 solution for 6 hrs in fresh and aged seeds of maize hybrid COH(M) 5 and its parental lines revealed that the priming treatments significantly influenced the physiological seed quality parameters of both fresh and aged seeds of maize hybrid COH(M) 5 and its parental lines UMI 285 and UMI 61.