Abstract: In this study carried out at the Research Farm of Canakkale Onsekiz Mart University between 1998-1999, the effects of Superalg, NZN, Crop-tec and Polyfeed fertilizers on yield and quality related characters of sunflower cultivar AS-503 were investigated. Although the effects of four different leaf fertilizers on 1000 seed weight, head and stem diameter were not significant. They had significant effects on seed yield, seed height, seed/husk ratio, oil content, plant height, seed dry matter and stem yield (P<0.01). In this study, the best results were obtained from Crop-tec and Polyfeed fertilizers. However, according to economic analysis, the finding suggest that NZN application has the highest gross margin per hector.