Trumpet Vine - Knowledgebase Question

Hamilton, NJ
Avatar for jgilsdorf
Question by jgilsdorf
May 21, 2000
My friend has a beautiful Trumpet Vine growing over a stump in her yard. She said I am welcome to take clippings from it to plant in my yard. How is the best way to get it to root for planting? Do I need to take a clipping during a certain time of year?

Answer from NGA
May 21, 2000
Trumpet Vine (Campsis radicans) is usually propagated
by cuttings, either tip cuttings (taken in June or July) or root
cuttings. When started from seed, the seeds are planted in
the fall because they require a cold period in order to
germinate, so you have several options.

Seed is the easiest. Allow the seeds to ripen in the pod naturally for as long
as possible, then plant them outdoors this fall in a carefully marked spot. However, and this is
especially true if your vine was a named selection, the seeds
may not produce an exact match or as nice a plant as the
parent plant. (This is due to natural variation is

In order to have the identical plant, you will need to
propagate it by a cutting. (There are a number of entries in
the Q&A database so you might check there for more
instructions also.)

Summer is the time to do this. Take about a six inch piece from the tip of a
vigorous shoot, dip the cut end in rooting hormone, and
stick it in a pot of moistened, clean soil mix or perlite or
vermiculite. Firm the soil well, then place the pot in a plastic
bag with the top slightly open to allow a bit of air circulation.
Place the pot in a bright spot out of direct sun and cross
your fingers. Keep the soil moist but not soggy, open the
bag more to increase the air circulation if you see any fungal
growth. You can plant it in the garden in late summer, or since it will be newly rooted, you could
shelter the plant over the winter in a cool yet protected spot
(a cold frame would be perfect) and then plant it in the
ground next spring.

Finally, you might try root cuttings. This works best in very early spring, but is worth a try any time. With a sharp flat spade,
dig straight down next to a shoot and try to separate it from
the main plant along with some attached roots. (Fill in the
resulting hole next to the parent vine.) Trim back the top
vine on your root cutting to about 18". Transplant
immediately to its new location; water it in well and mulch.
Keep the surrounding soil moist but not soggy until the
ground freezes this fall. (If traveling, keep the root wrapped in
moistened newspaper in a plastic bag, do not allow it to
either bake in hot sun or freeze.)

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