One method to propagate the butterfly bush is to grow seeds. You can grow butterfly bushes from seed, but it is generally faster and easier to propagate butterfly bush seedlings. Seeds need to be pre-cooled for up to four weeks before planting.
As butterfly shrub seeds require a lot of light to germinate, the seeds only need to be lightly covered with soil. Once sown, keep the seeds moist. They should germinate sometime within a few months, so be patient.
Propagation of butterfly bush cuttings
Can you root a butterfly bush? Yes. In fact, one of the easiest ways to propagate this plant is from butterfly bush cuttings. Simply pick up shoots from the tips of branches in spring or summer. Make stakes at least 3 inches long and remove the lower leaves. (Note: Pinching the tips of the cuttings will also promote more shrubby plants) As with most cuttings, making an angled cut will allow for better nutrient absorption and facilitate rooting.
If desired, dip the end in rooting hormone and stick it in damp sand and peat or potting soil. Place in a shaded but well-lit area, keeping it warm and moist. Wooden stakes can be taken in the fall and treated in the same way. You should start noticing root development on your butterfly bush cuttings within a few weeks.
Butterfly Bush Propagation by Division
The butterfly bush can also be propagated by splitting its roots. This can be done in spring or fall, depending on where you live and personal preference. Carefully dig up the mature butterfly bushes and remove excess soil. Then separate the roots manually or use a spade to divide the plants. You can transplant them into containers or place them in other suitable areas of the landscape.
