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

Saturday - June 30, 2012

From: Corpus Christi, TX
Region: Southwest
Topic: Planting, Herbs/Forbs, Trees
Title: Plants under an oak tree from Corpus Christi TX
Answered by: Barbara Medford

QUESTION:

My project: To grow white turk's cap under an old oak tree I first planted St. Augustine sod this spring because we had many oak suckers around the tree. We mixed new soil and compost, and laid the sod. Some suckers are coming through, but the grass is growing. Then I planted the turk's cap but had to cut through sod and oak tree roots in order to have deep and wide enough holes. I water twice a day in the South Texas heat or maybe it's because the sod and plants are competing for water. Some of the white turk's cap didn't make it, so I tried the red and pink Pam's Puryear varieties. Although I do have a few planting issues, Mr. Smarty Plants, do you have any recommendations for success with my planting project? Thank you!

ANSWER:

First, just to establish where we are: Malvaviscus arboreus var. drummondii (Turk's cap or turkscap) blooms both white and red, and is native both to North America and Texas and, according to this USDA Plant Profile Map, also grows natively in and around Nueces County. Malvaviscus arboreus var. drummondii   'Pam Puryear' (Pam Puryear Turk's Cap) is a hybrid between drummondii and Malvaviscus arboreus (Turkscap), both of which are native and the hybrid produces a pink flower, but will not appear in our Native Plant Database.

St. Augustine grass is native to Africa, but in view of the amount of shade you have, it may well be the only grass that will survive. Unfortunately, in these days of heat and water shortages, it is high maintenance and requires a lot of water. We are encouraging the use of native grasses although, as we said there isn't much to recommend for shade. Had you asked in advance, we might have recommended a good quality mulch over those tree roots instead of the grass; however, it's a little difficult to unplant. On the subject of the oak suckers you initially were trying to eliminate, please read this previous Mr. Smarty Plants question.

Now, let's go on to the part of your garden we consider most important: the oak tree. This is a very valuable part of your landscaping and, although you didn't tell us what kind of oak it is, many oaks are threatened by Oak Wilt Disease. This is often spread by work done around the oak trunk or cutting the roots, resulting in a wound.

So, recommendations for your project? Don't cut any more oak roots. Remember that oaks possess the trait called allelopathy, in which they emit substances to discourage competitive plants beneath them. You could do everything right and the plants below that oak will still die. We think you are watering too much. If the dirt in the planting holes was not amended for drainage, that extra water may be just standing on roots. You haven't done a single thing that we haven't done in the past. What you do is learn from the results. Your plants may all do beautifully, the oak sprouts may die away and the oak continue in good health for many more years. But if they don't, just figure out why and don't do it again.

 

From the Image Gallery


Turk's cap or turkscap
Malvaviscus arboreus var. drummondii

Turkscap
Malvaviscus arboreus

More Trees Questions

Surface tree roots hurting grass in Houston
March 21, 2013 - We have 2 mature Arizona Ash trees in our yard (30-40'). One of them is in a sunnier location and has developed an extensive network of surface roots (up to 1 to 1 1/2" Dia.) between the tree and th...
view the full question and answer

Do Deer Eat Orchid Trees?
March 08, 2013 - I have planted three anacacho orchid trees, however we have a lot of deer around us. Is this a tree they will want to eat? Do you have any ideas to keep deer away?
view the full question and answer

Variegated leaves on Ungnadia speciosa (Mexican buckeye)
April 11, 2007 - I grew some mexican buckeyes from seed last year and one of them has variegated leaves. I haven't seen this before- have I just not looked at enough mexican buckeyes up close or is this an uncommon f...
view the full question and answer

Will desert willow (Chlopsis linearis) grow in N. E. Mississippi
July 21, 2008 - I am located in N.E. Mississippi. A friend of mine sent me a few desert willow seeds. I have about 5 plants growing now that are about 6 inches tall. I was wanting to know first of all, is it possi...
view the full question and answer

Tree for caliche soil in Cochise County, Arizona
August 15, 2012 - What trees will thrive in areas of moderate caliche soil in southeast Arizona? My property is at 4,200 feet of elevation. Thanks for your help
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