Adventitious Rooting of <i>Lavandula</i> x <i>intermedia</i> Cuttings

Abstract Due to challenges associated with lavender propagation, Texas hybrid (lavandin) growers require revised propagation information. Therefore, experiments investigated effects of media and plant growth regulators (PGR) on rooting three different lavandin (Lavandula x intermedia) cultivars. PGRs applied cuttings were naphthaleneacetic acid (NAA), or indole-3-butyric (IBA) at concentrations. In addition, four examined. Cuttings exposed a peat moss/sand medium had the greatest mean overall percentage, number roots, regardless cultivar, longest roots. general, data also for dipped in NAA 0.5 1.0 g·L−1 (500 1000 ppm, respectively). Overall, across all PGR treatments ‘Grosso' tended have percentage compared no treatment, ‘Provence' ‘Hidcote Giant' greater concentrations produced an increased longer When cultivars, results indicate correct selection, formulation, concentration determine success. Index words: lavandin, Lavandula intermedia Emeric ex Loisel, moss, perlite, root quality, sand. Chemicals used this study: (IBA; 0.5, 1.0, 1.5 g.L−1); (NAA; g.L−1). Species ‘Grosso', ‘Provence', Loisel.).