Two experiments were conducted to determine the feasibility of propagating Chapman's rhododendron (Rhododendron chapmanii A. Gray) by rooting stem cuttings. In the first experiment, semi-hardwood terminal cuttings taken from native plants, rooted in moderate percentages (43 to 63%) with the percentage of commercially acceptable cuttings (cuttings having a distinct root ball) being less (22 to 53%). The second experiment used hardwood terminal and subterminal cuttings taken from containerized stock plants that originated from cuttings rooted in the first experiment. Percent rooting for total and commercially acceptable cuttings ranged from 81 to 94% and 39 to 64%, respectively. For both experiments, indolebutyric acid (IBA) treatments resulted in an increase in the percentage of commercially acceptable cuttings.
Paper No. 9660 of the Journal Series of the North Carolina Agricultural Research Service (NCARS), Raleigh, NC 27695-7609.
2Graduate student and Associate Professor, respectively. This paper is based on a portion of a thesis to be submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree. This research was supported in part by a grant to the senior author from the American Rhododendron Society Research Foundation.