Adventitious Root Formation in Rosa Multiflora ‘Brooks 56’ Hardwood Cuttings
Production of Texas field grown rose bushes is inefficient with less than 60 percent of Rosa multiflora hardwood cuttings developing into marketable plants after two years of commercial production. Uniformity of rooting of hardwood cuttings differs between field location and time of year. Treatments consisting of Hare's powder, 0, 3000, 10000 mg/l IBA (0, 300, 10000 ppm), 2N H2SO4 acid treatment, NaOH solution pH 10.5 and/or wounding were established to test the effect of selected chemical and mechanical treatments on rooting hardwood Rosa multiflora cuttings propagated under field and greenhouse conditions. Results were comparable between field and greenhouse propagated hardwood cuttings. Best treatments were with Hare's powder and wounding, while acid, base and IBA treatments did not enhance rooting. The importance of determining the physiological condition of field stock plants for successful rooting of hardwood cuttings is discussed.
Contributor Notes
Paper No. 19791 of the Texas Agricultural Experiment Station, College Station, TX 77843.
2Associate Professor of Horticulture. Statistical analysis of Mr. Steven Newman is gratefully acknowledged. Rose understock supplied courtesy of Mark Walters, Inc., Tyler, TX 75708.