Effects of Rooting Mediums and Growth Regulating Agents on Rooting Parameters of Lavender and Lavandin Cuttings (Lavandula sp.)

This study was conducted in Çanakkale province (North-West Anatolia) to determine the optimal auxin dosages (IBA at 2000 ppm and NAA at 1000 ppm) and rooting media (soil, peat, and cocopeat) for the cutting propagation of lavender, which holds significant industrial and commercial value. The research utilized three varieties belonging to the Lavandula angustifolia Mill species: Hemus, Sevtopolis and Drujba, as well as the Super A variety from the Lavandula × intermedia Emeric ex Loisel species. The experiment was organized with three replications, following a split-plot trial design divided into random plots. Results indicated that the Super A variety of Lavandula × intermedia Emeric ex Loisel, when cultivated in cocopeat medium with IBA at 2000 ppm, achieved the highest rooting rate (88.33%) and rooting status (17.67 units). The Sevtopolis variety of the Lavandula angustifolia species exhibited the highest values for root number (15.33), root length (9.88 cm), shoot number (20.93), and shoot length (15.35 cm) when grown in cocopeat medium with IBA at 2000 ppm. Based on these findings, the use of cocopeat medium and IBA at 2000 ppm auxin application is recommended for the effective propagation of lavender by cuttings.