Dry violet blue flowers of Echium amoenum (Gol-e-Gavzaban) has long been used in traditional medicine of Iran. In order to meet the ever-increasing demand of E. amoenum, for the indigenous systems of medicine as well as for the pharmaceutical industry, E. amoenum need to be cultivated commercially, but the physical and chemical situation of the soil fertility to plant production of E. amoenum is not known clearly. This experiment was conducted based on Completely Randomized Block Design with three replications and four treatments at Research Station, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in year 2009-2011. Treatments included: cow manure (30 t/ha), Urban compost (20 t/ha), vermicompost (5 t/ha) and control. The results showed that studied treatments had significant effect on the most of studied indices. The highest plant height was obtained in vermicopost treatment. The highest main and lateral branches numbers and number of flowers per plant were obtained in cow manure and vermicompost. In addition, the highest and lowest fresh flower yield and dry flower yield were observed at second and fourth harvest, respectively. Also, the highest and lowest number of flower per 5 g of flower obtained at fourth and first harvest, respectively. Hussien [3] reported that some of growth indices, dry and fresh yield of Dracocephalum moldavica increased by application of compost [3]. It has been stated that growth indices of plants increased through improving of physical and chemical characteristics of soil by application of organic manure [1, 2]. Tahami Zarandi et al.[4] found that the maximum dry and fresh yield of Ocmimum basilicum were obtained at third harvest [4]. Overall, our results showed that studied organic manures have positive effect on E. amoenum petals production.

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