Trumpet Vine - Campsis Radicans #150233 - Ask Extension


Trumpet Vine - Campsis Radicans #150233

Asked August 30, 2013, 5:35 PM EDT

Four years ago I planted a Campsus Radicans Trumpet Vine on my fence.  It is beautiful and has grown well.  I thought I did good research before buying it, but just discovered I may have made a serious mistake in planting this vine.  This year, for the first time, it has 6 to 8" pods and I wanted to learn about them.  When researching the pods I  discovered this is considered an Invasive plant.  After reading the stories of other people who have this vine and the problems they encountered, I believe I have to remove it this fall before it grows an even more extensive root system in my yard and my neighbors.  I am worried about how to go about doing this.  What can I use to kill it?  Any suggestions for removing it and killing the roots?  I live in the Denver metro area of Colorado.  Thanks.

Arapahoe County Colorado

Expert Response

Campsis radicans is considered an aggressive plant because the profuse suckering from it's underground runners.

However, aggressive does not necessarily mean 'bad' if you have a place that it can grow freely such as a woodland-type garden area, or a naturalized area. It is also a nice groundcover if you are trying to hide rocks, tree stumps or other unsightly areas of the landscape. It's best on a large arbor, fence or trellis as this vine can get large and heavy. And it attracts hummingbirds!!

If you want to remove it, cut it off close to the base and dispose of the vines making sure to get rid of flowers and seed pods left on the ground.

Use Triclopyr (Brush-b-Gone) which does best on woody plants. Apply it to the newly cut wood of the base. As you see 'shooters' come up, those can be sprayed with Glyphosate (Roundup).

Trumpet vine will take several years to eradicate so you will need an abundance of persistance AND patience.

Finally, if you are looking for a nice vine for your landscape, here are some links with information:
Donnetta Wilhelm Replied September 02, 2013, 12:57 PM EDT

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