To study the effect of Potassium (K), Zinc (Zn) and Iron (Fe) foliar application on saffron (Crocus sativa L.), two experiments were conducted in 2010 and 2011 in Bam and Gonabad. The experimental design was a randomized complete block with four replications. The type of elements (K, Zn and Fe) and dose of application (0, 1 and 3 lit/ha) were the treatments of these experiments. The experiments were conducted under well-watered condition. Results showed the effects of elements on leaf length, LAI, stigma dry weight, crocin, picrocrocin and safranal were significant. Fe showed higher amounts in mentioned traits than K and Zn. Also the highest amount of these traits were obtained from high dose foliar application (3 lit/ha). On the other hand traits measured in Gonabad experiments were more than Bam. Although combined analysis of variance showed that the difference between years was not significant. Also results showed that although there is the possibility of saffron planting in Bam, but the amount of saffron yield, safranal and picrocrocin in this region was less than Gonabad region. Nevertheless the amount of crocin was not significant in these regions.
