This work was carried out at the Kafr-Hakim, Giza, Egypt, during the two successive seasons of 1997 and 1998. The field experiments were carried out to study the effect of seed rates and stigmasterol as foliar spray on growth characters, yield and chemical constituents of wheat plants (Triticum aestivum L.).                 The data revealed that seed rate in combination with stigmasterol had significant positive effects at most levels on growth parameters. However, no significant effect on yield components. Moreover, the maximum values of growth and yield were obtained as a result of the interaction between seed rate at 70kg/fed and foliar spray of stigmasterol at 200 ppm.                 Application of seed rate at 80kg/fed, with stigmasterol at 150 increased nitrogen, protein and phosphors content in produced grains. Total sugars and total soluble sugars reached maximum values as a result of seed rate at 70 kg/fed, with stigmasterol at 100 ppm.