From:Newtown, PA Region: Mid-Atlantic Topic: Vines Title: Non-blooming of Campsis radicans, Trumpet Vine Answered by: Joe Marcus
I have a trumpet vine that does not bloom. My neighbor has the same plant and it blooms profusely. I have pruned the vine in February as was suggested on another site. It is healthy and is planted about fifty yards from my neighbor and in the same sun exposure. What can I do to get it to bloom?
Trumpet vine, Campsis radicans (also known as Trumpet creeper) is a popular, though sometimes overly aggressive native vine. It typically flowers dependably, but from time to time seems to defy our best efforts to make it bloom. In fact, giving our best effort may be part of the problem.
Many vines produce flowers only when they transition from a state of vegetative growth to a "mature" state. Plants that are rapidly growing or are growing in a nutrient-rich environment simply don't make that transition. However, environmental stress often triggers the necessary physiological change and induces flowering.
An old gardening trick for such plants is to create some environmental stress that will produce the desired results. Decreasing available soil nitrogen by withholding fertilizer is often the easiest way to promote flowering, but it can take a year or more to see a change. Some gardeners root prune as a way to stress their plants into flowering. This is done by simply going around the base of the plant a couple of feet from the base of the plant and piercing the soil in a few places with a garden spade. Do not cut all of the roots this way, just make a few such cuts to sever enough of the roots to "shock" the plant out of vegetative growth and induce flowering. Withholding water is sometimes effective in areas of low rainfall or during drought.
If you try these techniques and you still get no flowering, ask your neighbor if you can get a start from her vine. Trumpet vine is easy to propagate and is fast-growing. Getting a new vine that is known to flower prolifically is sometimes a last resort.
More Vines Questions
Identification of vine with dangling fruit March 03, 2009 - I live in a hollow with rolling hills all around. there are wild grape vines, wild cherry trees, walnut trees, rasberry canes, black berry canes, a persimmon tree,(the asgtringent kind), maples, hicor... view the full question and answer
Vine for privacy on a deck in Southern California December 10, 2009 - I am looking for a climbing vine/plant that is non-flowering and can be grown year round in Southern California. We are looking to help create a private area along a deck for my grandmother because h... view the full question and answer
Question about male muscadine plants June 01, 2012 - I have 9 muscadine plants, 3 females and 6 perfect flowered growing in my yard. A plant started growing under my porch lst year and it grew through the spaces between the boards. It grew nicely. It fl... view the full question and answer
Want to identify thorny vines growing in Charlotte Hall, MD April 25, 2013 - I have vines with thorns growing in my wood, vining around the trees and killing them. It grows and vines go up trees of any height all the way to the top. It has green pointy leaves. If it doesn't... view the full question and answer