How do I propagate Kolkwitzia amabilis?
There are a couple of methods of propagating Kolkwitzia amabilis, sometimes known as Linnaea amabilis. Fine Gardening says to take greenwood cuttings in late spring or early summer, or remove suckers in spring.
The American Horticultural Society’s Plant Propagation, edited by Alan Toogood (DK Publishing, 1999) says to take softwood and greenwood cuttings in late spring or early summer. Kolkwitzia amabilis is known to root easily from cuttings, and the new plants should flower in three years. The cuttings should be “two internodes or about 3 inches long; avoid thick, pithy water shoots and look out for tips distorted by aphids. Root semi-ripe cuttings in a tray or directly in pots. Rooting takes 4-6 weeks.”