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 - June 28, 2010

From: California City, CA
Region: California
Topic: Non-Natives, Septic Systems, Grasses or Grass-like
Title: Non-native smoketree for California City, CA
Answered by: Barbara Medford

QUESTION:

I was wondering if you could tell me if it would be a good or bad idea to plant a Smoke Tree (most likely European) in the vicinity of a septic tank. We are looking for something which will provide a moderate amount of privacy, since we live in the middle of the desert, and have very few neighbors. We are also considering Cordylines as an scattered around the smoke tree. Any help that you would be able to provide would be greatly appreciated. Thanks in advance. Ian Kelly

ANSWER:

Sadly, you have presented Mr. Smarty Plants with several ideas he considers bad. First, you should never plant a woody plant, like a tree or shrub, over a septic system. Those woody roots underground are larger than the tree visible aboveground, and relentless in their progress. They can lift sidewalks, crack foundations and certainly play havoc with a septic system. Our recommendation for use over septic systems is always grasses native to the area. Their long fibrous roots will hold the soil, draw up some of the moisture in the septic lines, but will not interfere with them.

Our second version of a bad idea is to plant the European smoke tree, Cotinus coggyria, (from Floridata) which is native to southern Europe, central Asia and the Himalayas.  The Lady Bird Johnson Willdflower Center is dedicated to the growth, protection and propagation of plants native not only to North America, but to the area in which that plant is being grown. 

And, in spite of it being native to North America, we don't think it's a good idea to try to plant  Cotinus obovatus (American smoketree), in your location in the Fremont Valley of the Mojave Desert. Although both the native and non-native smoketrees are listed as being viable in USDA Hardiness Zones 5 to 8, and your area on the eastern border of Kern County is Zones 8a to 9b, it still is a long way from the nearest area where either of them is believed to grow. A few counties in Central Texas are shown on the USDA Plant Profile as having the American smoketree growing, that is as far west as they go. The European smoke tree grows in the East and north up into Canada.  

Both of these trees are relatively rare in trade and difficult to transplant. Since you should not plant it over your septic system anyway, why waste your time and effort over a tree that will probably not survive there?

From our Native Plant Image Gallery:


Cotinus obovatus

Cotinus obovatus

Cotinus obovatus

Cotinus obovatus

 

 

More Grasses or Grass-like Questions

Best time to plant Habiturf in Austin
February 20, 2012 - When is the best time to plant Habiturf seeds?
view the full question and answer

Wintering non-native liriope spicata indoors in Chillicothe IL
November 08, 2013 - I live in zone 5, zip 62523, wintering liriope spicata starter plants in basement, ambient consistent. Do I need grow lamps or is the plant satisfied being dormant as long as I do not let it dry out? ...
view the full question and answer

Non-native invasive chickweed in Collegeville PA
December 31, 2011 - My problem is chickweed. I have found considerable information on how to eliminate the chickweed. My question is after following a suggested elimination process: How and when do I reseed with grass?...
view the full question and answer

Shade Tolerant Grasses and Groundcovers for Waco TX
March 15, 2013 - What is the best shade-tolerant grass? What is the best shade-tolerant ground cover?
view the full question and answer

Curvularia blight in buffalograss in Kansas
March 05, 2009 - Our buffalo grass is infected with a fungus called curvularia. How can we treat it?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center