N. Kovatcheva Abstract. The oil-bearing rose (Rosa damascena Mill.f.trigintipetala Dieck) is of priority economic importance to Bulgaria, whose products are entirely export oriented. The main limiting factor for its development are meteorology conditions throughout the growing season.

Oil bearing roses are traditionally grown in regions like the famous “rose valley” in Bulgaria where the climate is known to be favorable for high rose flower and essential oil yield. However, environmental conditions could vary within the microregions of the rose valley as well as be