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

Monday - March 09, 2009

From: Pflugerville, TX
Region: Southwest
Topic: Poisonous Plants, Grasses or Grass-like, Herbs/Forbs, Trees
Title: Potential allelopathy of cultivar of Artemisia ludoviciana
Answered by: Janice Kvale

QUESTION:

I recently submitted a question regarding allelopathic potential of artemisia ludoviciana on rusty blackhaw viburnum, not specifying that I meant Vibernum rufidulum. Mr. SP interpreted my viburnum as Viburnum lentago, which is not what I have. Sorry for the confusion. Anyway, I read the USDA fact sheet and it did indicate further down that the cultivar of A. ludoviciana called Summit can be allelopathic. I don't know if I have this cultivar or not, but if so would it affect an established plant or only seedlings?

ANSWER:

Thank you for clarifying your information and giving Mr. Smarty Plants an opportunity to amend the reply. You are correct that the USDA identifies as allelopathic a cultivar of Artemesia ludoviciana called Summit. A comprehensive search of national and international research literature did not yield data to corroborate this information. Only a DNA analysis will identify the correct cutivar of your Artemesia. Mr. Smarty Plants guesses that this would not be an easy or attractive option to you. Chances are the artemesia is not toxic to a well-established plant, but you may be unwilling to take that chance with your two lovely native trees. If that is so, Mr. Smarty Plants suggests removing the Artemisia and planting a different ground cover between your trees. (You could move that Artemisia near something you want to get rid of and see if the Artemisia will do the job for you!)

The point here is that when you are dealing with cultivars and hybrids, you seldom know what the parents of the hybrid are or what their characteristics were. It's unlikely that the vendor who sold you the plant knows, and probably not even the wholesaler who grew the plant in greenhouses and shipped it to your local nursery. Although allelopathy can work through roots, stems or branches, it is most often exhibited in trees shedding their toxins on plants having the audacity to try to grow beneath them. It might kill freshly emerging seedlings, but you probably aren't trying to establish a viburnum forest anyway. 

So, your next question might be, what should replace the Artemesia? Appreciating your commitment to Texas native plants, return to the Native Plant Database. Select location (Texas), habit (grass or herb) and duration (perennial). The requirements for your site will probably be shade and dry for light and soil moisture. Using that information, Mr. Smarty Plants found 9 grasses and 43 herbaceous plants potentially suitable for your site. Good luck!

 

 

More Grasses or Grass-like Questions

Aggressive native Inland Sea Oats in Whitehouse Station NJ
April 29, 2010 - Can you direct me to a source of help managing a very aggressive grass, Chasmanthium latifolia, Woodland Oats or Indian Sea Oats. It is behaving like a very noxious plant and I am concerned as I am h...
view the full question and answer

Native grasses for South Texas Coast
April 02, 2010 - Grasses S. Texas Coast. Hello! I love all of the information available in your database Mr. Smarty Plants database (as well as the rest of the site) and find it quite useful on many fronts. My...
view the full question and answer

Drought-resistant plants for Paradise, California
January 23, 2009 - We are moving to a new home in Paradise, CA. What drought resistant plants do well in Paradise ? Thank you !!
view the full question and answer

Planting grass seed in Greenville SC
April 24, 2009 - What type of grass seed is best to use in a sunny/ shady area where some grass is already growing? And how is the best way to prep the area for seed and fertilizer or what should I do before and after...
view the full question and answer

Turf grass for part-time home from Louisville KY
April 28, 2012 - We have a small yard at a remote location with cistern water, and need a turf grass for a yard, clay soil, which I am willing to amend. It will receive sporadic attention as my husband and I do not l...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center