Because of compatibility to flat of safflower planting, fluency of agricultural management and high economic yields of seed and petal, Isfahan farmers have paid attention to summer planting of safflower. In recent years few genotypes have been selected from Isfahan local variety Koseh. However, information about their compatibility to summer planting in Isfahan is lacking. Thus, an experiment was conducted during 2004 at the Agricultural Research Farm, College of Agriculture , Isfahan University of Technology. The experiment was laid out using a randomized complete block design with three replications. The experiment was consisted of Arak2811, Isfahan local variety Koseh and 16 genotypes selected from Isfahan local variety Koseh. The analysis of variance showed that there were significant differences between genotypes for all phonological characters except numbers of days to 50% emergence. Genotypes SOD17 and SOD9 were the earliest and latest genotypes, respectively. There were no significant differences between genotypes for plant height, number of first degree branches, number of abortive heads and fruitful heads in each first degree branches, number of head per plant, number of seeds per head and 100-seed weight at of physiological maturity, but differences among genotypes for seed percent oil, seed and oil yields (kg/ha) were significant. Genotypes ORB66 (31%) and SOD9 (27/7%) had the highest and lowest oil percentage respectively. ORB66 (5422/6 kg/ha) and CA411 (1041 kg/ha) had the highest and lowest seed yield. In addition ORB66 (1681 kg/ha) had the highest oil yield whereas SOD6 (343/3 kg/ha) and CA411 (283/9 kg/ha) had the lowest oil yield. The result showed that ORB66 may be suitable for summer planting in Isfahan .