Explore Plants

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 

Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.

rate this answer
1 rating

Friday - August 25, 2006

From: Newtown, PA
Region: Mid-Atlantic
Topic: Vines
Title: Non-blooming of Campsis radicans, Trumpet Vine
Answered by: Joe Marcus

QUESTION:

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?

ANSWER:

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 growing near river in New Hampshire
August 31, 2009 - I found a small vine growing near a river in NH. It has five point leaflets similar to sumac but much smaller. The flowers were pink with a deep purple/burgundy on the inside. The flowers are in clus...
view the full question and answer

E-mailing a picture for Plant ID from Dexter KY
June 25, 2012 - Could I email a picture of a vine that is taking over my porch? Can't seem to find it anywhere. It is dark green and relatively shiny with 10 leaves on each stem.
view the full question and answer

Smarty Plants on hyacinth bean vine
July 01, 2005 - I'm looking for what I believe is a wild vine. All i know is that it has purplish colored beans and the flowers are also purple. Also the vine itself is purplish. i believe that the vine is either fro...
view the full question and answer

Vine with edible nut in Chattooga County, Georgia
March 01, 2011 - From an email to this Master Gardener- The lady said when she was young her grandmother had a vine that grew along ground that produced small edible nut. As kids they called them chew-chews. Any idea ...
view the full question and answer

Vine for Marin County, CA
August 31, 2012 - Looking for relatively fast growing evergreen vine (not Ivy). Plant along sturdy 7 foot wire fence. Mostly sun, some shade. Soil drains reasonably well. I had some success w/ star jasmine, but too...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.