Water is one of the effective factors in economic production of flowers. Rosemary shrubs are very resistant to dehydration. Evidence shows that irrigation of flower beds is very important at the time of budding and flowering. In Kashan Golestan, irrigation is usually done superficially. In this region, the amount of water in each turn and the number of irrigations is very variable. In Kashan region, normally, irrigation is done every 15 days during the growing season. In a comparison between surface and drip irrigation methods, it was found that; Drip irrigation, while saving 62% more than the surface method, increases flower yield by 65%.