Taming a Monster: Pruning the Jasmine Arch

It amazes me how sometimes I can ignore a developing problem in the garden (or other areas of my life!) until the issue suddenly overwhelms me. This is what happened with the two jasmine vines, Trachelospermum jasminoides, that cover the arch by the patio. 

Yes, Confederate jasmine, also called star jasmine, is a vigorous vine, but I love the lush look and the thousands of fragrant late spring blooms. This is the jasmine arch a few years ago. I pruned it only minimally since then.Earlier this year my husband Lou attempted to control its growth by shearing it, which solved the problem for a couple of days, until the plant responded with multiple spurts of growth at every single cut he had made. Hint: Don't shear a jasmine vine unless you are using it as a ground cover. Otherwise it becomes a monster pruning problem. I told Lou to stop shearing it. Instead, I began tucking excessive shoots into and around the arch.

Then one day Lou complained that he no longer could walk under the arch. All those long tendrils I had been working with were escaping the arch and threatening to devour passersby. I discovered that even I had to duck to get through, and I am a foot shorter than my husband.

I did some research about the proper procedure for pruning a jasmine vine. I was not encouraged. One source told me to detangle the vine and then lay it on the ground, cut back one third to two thirds of the growth, then finally reattach the vines to the support. Once I started, I realized how difficult this was going to be. I have a mature vine on each side of the arch, and the two were hopelessly twined together. This is what the arch looked like just after I started:

Over two days, I patiently detangled as many vines as possible, then trimmed away excessive side growth and shortened main stems. It was a rather sticky job, since jasmine excretes a sap when cut. I realized that I should have been doing this every year as soon as it finished blooming. Then my vines would not have become so out-of-control. Lesson learned. 

Here is the final result:

It was worth the trouble. I am looking forward to next year's blooms. I can see the arch again, and dear hubby has no problem walking beneath it. 

For more information about Confederate jasmine see my previous post:  Confederate Jasmine for a Fragrant Layer in the Garden

Comments

[Kris P]

I inherited a star jasmine trained over one side an arbor on the north side of our house. It too is out of control, as is the Pandorea jasminoides growing up the other side. Anytime you're out this way and want to drop by and help me manage mine, you're welcome, Deb! ;) There are some in the front garden too but they were used as groundcovers there. They still need watching as they like to climb through other plants when one isn't watching.

[Pauline]

I have one on my pergola which I have given a very gentle prune each year. Last year, Neil who helps me in the garden, cut it back hard, I'm not sure why. The result was bare branches that looked dead for months and I was beginning to despair of it recovering. Eventually green shoots appeared and now it almost looks back to normal, though I didn't get any of the lovely flowers this year. It will be light pruning only from now on!

[Denise]

You did a beautiful job Deb! I have this problem with my Wisteria. It is also a monster.

[Diana Studer]

We inherited star jasmine. In a Christmas storm one came crashing down - then I removed them both.

But the indigenous creepers I have on the kitchen trellis have also exploded into growth.
Quite a mission to untangle, cut back and replace - I admire your dedication.

[Jason]

Great work! I can understand your affection for this vine (though I couldn't grow it). Glad you could save it while keeping it from eating any strollers.

[hb]

Your arch is beautiful both ways. I guess people do have to be able to walk on the path though. Your patience in thinning out such monstrous growth is a feat!

Here I've struggled to get Trachelospermum to cover an arch. After quite a few years it's now halfway. Wheee!!! I think the difference is rain. You must get some!

[Lalon]

Thank you for the interesting article! Pruning Jasmine is definitely a challenging task, and it's great to see the tips and tricks professionals use to tame this monster. Pruning can be time-consuming, but it's essential for keeping your code robust and efficient. It's also great to see the various tools available to help with the process. Thanks for sharing!