A greenhouse experiment of maize (Pioneer P444) was conducted in Bader region, Behera governorate, Egypt to investigate the successive salinity application, irrigation level and potassium salt effects on maize germination and growth. Three levels of irrigation were included (80, 60 and 40 % of the potential evapotranspiration (ET)) as a main factor and four potassium salts (Control, K2SO4, KNO3 and Salwax) as a sub factor with three replications. Moderately salinity water (≈4 dS/m) was used. Germination of seeds and growth parameters of maize were monitored. A second-degree polynomial was implemented to describe some growth parameters. The results showed that the potassium salts did not affect the seed germination in comparison to the control. The polynomial well described the plant height and leaf number as a function of growth time with an approximated R2 of 0.99. The plant height and leaf number increased as the irrigation level increased but the stem diameter behaved differently. The stem height and leaf growth rates decreased with time for all investigated treatments. The irrigation levels at 80 and 60 % ET quickly increased the soil salinity compared to that irrigated at 40 % ET.