Rent Shop Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

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
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Saturday - July 07, 2012

From: Medina, OH
Region: Mid-Atlantic
Topic: Invasive Plants, Non-Natives, Vines
Title: Hybrid Campsis radicans 'Madame Rosy' from Medina OH
Answered by: Barbara Medford

QUESTION:

I have a Madame Rosy Campsis that is not blooming. We purchased and planted it last year, mid-summer and it did well for the remainder of the season but this year...nothing but green leaves........what can I do?

ANSWER:

From the Sooner Plant Farm, here is some information on this cultivar, which is a cross between Ohio native Campsis radicans (Trumpet creeper) and Campsis grandiflora, which is native to China and Japan. Since Campsis grandiflora will not appear in our Native Plant Database and we have no idea what effect the hybridization would have on the resulting plant, we will just make a couple of educated guesses.

If you follow the plant link Campsis radicans (Trumpet creeper) to our webpage on this plant it will help understand what growing needs the native has, at least. According to that page it needs full sun (6 or more hours a day of sunlight) to bloom well, and has red, orange or yellow flowers from June to September. It is possible that in your cooler hardiness zone, they may not start blooming until later in the summer. Another possibility is that the plant you purchased in the nursery had blooms that had been forced for better sales, and the plant is not yet quite mature enough to bloom normally. A third possibility is that the plant is being fertilized too heavily, especially with high nitrogen fertilizers. These are intended for grass, and stimulate green leaf growth. An over-supply of nitrogen can inhibit blooming. And,in fact, most native plants need little or no fertilizing, but since your plant is not totally native, we couldn't be sure about that.

Please also note that the Trumpet Creepers are all etremely aggressive and can become invasive. Don't let it get away from you, keep it clipped and trimmed and in check, or you'll have vines coming in your bedroom window.

Pictures of Campsis grandiflora

 

From the Image Gallery


Trumpet creeper
Campsis radicans

Trumpet creeper
Campsis radicans

Trumpet creeper
Campsis radicans

More Non-Natives Questions

Non-native zoysia and bermuda grasses in Austin
July 11, 2013 - We have Bermuda grass in the front and Zoysia in the back yards. The back grass is fine but the front yard Bermuda isn't. We have watered once each week during the spring and during the past 3 weeks...
view the full question and answer

Non-native Chinese pistache in Eagle Pass, TX
June 14, 2009 - Hi Mr Smarty Plants!! I just bought a young chinese pistache tree, is no bigger than 7 feet. I've never had one of these trees before, I'm about to plant it and I would also like to fertilize it...
view the full question and answer

Differences between Desmodium and Lespedezda
June 19, 2014 - i am trying to determine the difference between lespedeza and desmodium in my full sun wildflower and tall grasses meadow. There appear to be a number of different types of these plants, and they are...
view the full question and answer

Non-flowering plants in Scottsdale AZ
July 01, 2013 - I have three plants that are supposed to do well in Arizona but mine are not flowering. The yellow bells and orange jubilee I have get full sun, drip watered 3 x a week for 1 1/2 hrs (at 4am) and are...
view the full question and answer

Trees for shade in Austin
May 20, 2012 - I live in Austin and I am looking for a good tree to plant under a large live oak I have in my backyard. Something slow-growing of course and, the garden only gets late day sun for about an hour. Filt...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.