En EspaŅol

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
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

Wednesday - May 09, 2007

From: Austin, TX
Region: Southwest
Topic: Non-Natives, Vines
Title: Slow flowering wisteria
Answered by: Jimmy Mills

QUESTION:

We have a young wisteria growing on the side of the house. It began to flower this year for the first time. Whereas my neighbors' wisterias all bloomed in February, ours has only begun to bloom in mid-April. Is it possible that our wisteria is native, wisteria frutescens?

ANSWER:

You may have the native American wisteria (Wisteria frutescens), but more likely you have either the non-native Japanese wisteria (W. floribunda) or the Chinese wisteria (W. sinensis). Whichever it is, the wisterias are notoriously slow to flower. This may be caused by a combination of factors including the age of the plants, the amount of sunlight, and nitrogen levels in the soil. Older plants are more likely to flower, plenty of light is a necessity, and high nitrogen levels, vis-a-vis phosphorous, reduce flowering.

As to the identification of the plants, one fairly reliable characteristic distinguishing the different species is the length of the flowering cluster (raceme). W.floribunda is the longest with 12-18 inch racemes; W. sinensis follows with 6-12 inches; and W. frutescens is last with 4-6 inch racemes.

Check the following sites for even more information about these beautiful plants. Oregon State University Department of Horticulture, and Growing Wisteria from the Ohio State University Extension Service

 

 

 

 

 

 

 

 

More Vines Questions

Non-flowering deciduous vine for Phoenix AZ
March 27, 2011 - Are there any non-flowering deciduous vines native to the Southwest? I'd like to plant them to shade our windows in the hot Phoenix summers. If only perennials are available, can I cut it back each w...
view the full question and answer

Is there a simple way to
November 12, 2014 - Is there a relatively simple way to "guess" how old wild grapevine is?
view the full question and answer

Virginia creeper in trees
April 26, 2008 - Can Virginia creeper be allowed to climb on trees--specifically Texas ash and live oak--or will it damage them if allowed to attach itself? We are thinking of using it as erosion control in a greenbe...
view the full question and answer

Invasive mandevilla from Chula Vista CA
December 10, 2012 - How can I rid my yard of mandevilla that has invaded from my neighbor's yard?
view the full question and answer

Plants for pergola in Lubbock TX
May 29, 2013 - I need suggestions of plants, vines, bushes to plant in my backyard near my wooden pergola that will work well in full sun in Lubbock, TX. Ideally, I'd like some that attract hummingbirds and provide...
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center