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

Injury from non-native Canary Palm from Torrance CA
October 18, 2013 - I got stuck in the eye a yr ago by a Phoenix canariensis. It went through my retina and through the integral chamber and put a stamp on my lense. There was no room for any more err without causing bli...
view the full question and answer

Fast growing native hedges for Sachse, TX
March 30, 2007 - I just bought a house in Sachse, Tx and want to plant a privacy hedge. It will be about 220' long and I want it to grow to at least 10'-12' high. I also want it to be fast growing and be evergree...
view the full question and answer

Dying leaves on Autumn Blaze Maple tree in Littleton, CO
May 25, 2012 - I have an autumn blaze maple where for the last two years the left side of the tree turns light green, then brown, and leaves die. The right side is dark green, normal. Is this a water over/under pr...
view the full question and answer

Do I need to plant a male winterberry? yes
October 19, 2007 - I planted a female winterberry in early July & although I have been watering it regularly the leaves turned brown on the tips in Sept. No berries yet so will I have to plant a male? Thanks, Carol
view the full question and answer

Weird growth on oaks in Middleburg FL
February 05, 2011 - Dear Mr. Smarty Plants; I have this plant/fungus that grows on my trees here in northeast Florida & nobody has been able to identify it for me. It looks like a clump of pine needles growing on the ba...
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