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
Not Yet Rated

Sunday - September 19, 2010

From: Horseshoe Bay, TX
Region: Southwest
Topic: Non-Natives
Title: Dying branches on non-native buddleias in Horseshoe Bend TX
Answered by: Barbara Medford

QUESTION:

Our Black Knight buddleias are developing branches that die. The leaves just turn brown and the whole branch dies then another and finally the whole plant dies. Do you know what could be causing this? Thanks

ANSWER:

There are 5 members of the Buddleja genus listed in our Native Plant Database as native to North America, and all 5 are also native to Texas. The Buddleia davidii is native to China and Japan, and therefore falls out of the range of expertise of the Lady Bird Johnson Wildflower Center, which deals with plants native not only to North America but also to the area in which they are being grown. 'Black Knight' is a trade name for a selection of Buddleia davidii.

This article from  Floridata Buddleja davidii 'Black Knight' will give you some information on care of the plant. From the US Geological Survey, Biological Resources Division, you can find material on pests and diseases of this plant. In particular, note this extract from the article:

"Pests and diseases: Buddleia have very few pests but are susceptible to caterpillars, weevils, mullein moth, spider mites, fungal leaf spots and dieback."

After reading these articles, you will likely find that the soil or excess moisture in the soil with poor drainage is causing your plant problems.

Pictures of native Buddleja from our Native Plant Image Gallery:


Buddleja marrubiifolia

 

 

 

More Non-Natives Questions

Pruning non-native razzmatazz rose from Canton MI
April 26, 2010 - I have 5 "hardy" rosebushes called "Razzamatazz" which are about 3 years old. I don't know how to prune them properly. I do cut the dead bloom back just before the "leaf of 5", which seems to...
view the full question and answer

Brown rings on grass under live oaks in Austin
June 13, 2013 - There are brown rings in the grass at the dripline on several Live Oak trees in our neighborhood. What causes this? The trees appear healthy.
view the full question and answer

Non-native Japanese red maple exposed to full sun
August 16, 2008 - I planted a Dwarf Japanese Red Maple tree about 3 yrs ago. Until about a month ago it was partially shaded by a massive chestnut tree, that has since been cut down. Now the new growth on my tree appea...
view the full question and answer

Seeds of agave attenuata from San Diego CA
April 16, 2012 - After the agave attenuata bloom dried up there are seeds like thing hanging on the foxtail; do I leave it until it dies or do I chop that down. Are those seeds for propagation. The leaves of the plan...
view the full question and answer

Disposal of non-native invasive clerodendron
August 15, 2007 - What do you do about clerodendron that is spreading like wildfire. A friend gave me one plant before I was acquainted with invasives!!
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