En EspaÑol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - What will grow under a magnolia in Houston?

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

Searching for a red mulberry tree (Morus rubra) to buy
March 17, 2008 - Want to purchase a native Texas Red Mulberry tree (morus rubra). Can't find one. Can you help? Thanks,
view the full question and answer

Black Walnut tree in LA
March 12, 2012 - I was just given a black walnut tree and am trying to determine where to place it. I’ve read on your site that “Certain plants will not grow under Black Walnut trees because of the juglones that the ...
view the full question and answer

Source for Ashe Juniper seeds from Blanco Co., TX
March 10, 2014 - I'm trying to find Ashe Juniper seeds to plant in bare areas of my property in central Texas. I understand they grow well in rockier soil and have many other benefits for native animal species. Unfo...
view the full question and answer

Diagnosis of problem with Parsley hawthorn
August 06, 2007 - I have a Crataegus marshallii (Parsley hawthorn) that is about 3 years old. It leafed out this spring and flowered lightly. As the summer has progressed, though, the leaves have been dropping premat...
view the full question and answer

Why are my potted Prunus caroliniana plants shedding leaves in LA, CA?
May 02, 2011 - I bought Prunus caroliniana in pots to use as privacy fence on my balcony. Have had them for about 6 weeks and they are shedding a lot of leaves. Some leave are drying out and others have what ...
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