Herbaceous Perennials Stem Cuttings
Propagation by stem cuttings is an important means of increase for certain perennials (see list at the end of this article). The major appli cations of this method are with species which are not easily propagated by seed for one reason or another, and with certain named cultivars which need to be propagated asexually. While both cuttings and division will produce plants that are "true-to-type," cuttings are a more efficient means of asexual propagation. Cuttings may also produce more vigorous plants with less disease problems than divisions.
Source: • BP News Bedding Plants, Inc.