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

Friday - May 21, 2010

From: Houston, TX
Region: Southwest
Topic: Trees
Title: What will grow under a magnolia in Houston?
Answered by: Barbara Medford

QUESTION:

What will grow under a magnolia tree in Houston? The area is shade and partly sunny.

ANSWER:

From a previous answer   about planting under magnolias:

Magnolias are allelopathic to other plants.  This means that the magnolia produces chemicals that inhibit the germination of seeds and growth of plants that are potential competitors for its resources.  The roots and fallen debris (leaves, flowers, etc.) from the magnolia tree contain substances that limit the growth of other competing species that grow underneath it. In the case of magnolias, the substances are sesquiterpene lactones—costunolide and parthenolide—(see Abdelgalel, A. M. and F. Hasinaga.  2007. "Allelopathic potential of two sesquiterpene lactones from Magnolia grandiflora L." Biochemical Systematics and Ecology Vol. 35, no. 11, pp. 737-742.)  A complicating factor is that many plants won't grow in the dense shade created by the magnolia tree—or any other tree, for that matter.

I could find no list of plants that are resistant to the allelopathic effects of magnolias.  So, my recommendations to you are:  1) keep the debris from the magnolia cleaned up from the area where you want the flowers/plants to grow, and 2) choose native plants that are shade-tolerant. There is no guarantee that these will do well, either. Follow each link to the page on that particular plant to learn about propagation, conditions, expected size, etc. Here are a few recommended shade-tolerant plants that are native to Harris County or a nearby Texas county:

Shrubs for Shade in Houston:

Callicarpa americana (American beautyberry)

Hibiscus laevis (halberdleaf rosemallow)

Malvaviscus arboreus var. drummondii (wax mallow)

Symphoricarpos orbiculatus (coralberry)

Herbaceous Blooming Plants for Shade in Houston: 

Coreopsis lanceolata (lanceleaf tickseed)

Lobelia cardinalis (cardinalflower)

Salvia coccinea (blood sage)

Podophyllum peltatum (mayapple)

From our Native Plant Image Gallery:


Callicarpa americana

Hibiscus laevis

Malvaviscus arboreus var. drummondii

Symphoricarpos orbiculatus

Coreopsis lanceolata

Lobelia cardinalis

Salvia coccinea

Podophyllum peltatum

 

 

 

 

More Trees Questions

Need a recommendation for a tree to replace an oak tree in Spring, TX.
September 08, 2009 - I recently had an oak tree removed from my yard and want to replace it with a nice tolerant shade tree. My yard measures 65x35. What are the best non-invasive shade trees to plant in my area?
view the full question and answer

Small native evergreen tree for Long Island, NY
October 06, 2008 - Hi, I am looking for an evergreen tree to plant on Long Island NY. I plan on planting it in my front yard. At maturity to about 10-15ft about 5 ft wide. Not sure about soil, the area gets good AM sun ...
view the full question and answer

Trimming back freeze damage from Anacacho orchid in Liberty Hill TX
May 17, 2010 - When is it safe to trim back what I think is dead wood on my Anacacho orchid trees (that were hit hard this past winter)? Is there any harm done if I cut back living wood?
view the full question and answer

Possibility of symbiotic relationship between cedar elm and ashe juniper
November 14, 2006 - Is there a symbiotic relationship between cedar elm and ashe juniper? We have a small ashe juniper sapling and a small cedar elm sapling growing near each other (actually, we planted the juniper 2 yea...
view the full question and answer

Oaks emitting substance in Lakeway TX
August 14, 2012 - We have two large oak trees in our yard that are emitting a clear, very sticky, non-fragrant substance. The leaves are beginning to be covered as is our deck. Bees are now attracted and I am worried ...
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