En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
1 rating

Wednesday - June 06, 2012

From: Rosanky, TX
Region: Southwest
Topic: Compost and Mulch, Planting, Trees
Title: Overwatering Texas Mountain Laurel from Rosanky TX
Answered by: Barbara Medford

QUESTION:

I just read your article in the Statesman about over watering Mt.Laurel. Now I know why my lovely 15 year old tree is dying. We put in new grass this winter and I watered too much. Is there any hope of it coming back even though the leaves are now completely brown? It died quickly, just about last week. Is there anything I can do to help the situation? I am so sad. Thanks for your help.

ANSWER:

We would be surprised if a Sophora secundiflora (Texas mountain laurel) went down that easily just because of overwatering. If you follow the plant link above to our webpage on the plant, you will learn it needs very good drainage. It could be that something that happened 15 years ago, as in the initial planting of the plant, may be the culprit. First of all, rearrange your sprinkler system, if that is how you have been watering the grass, so that it does not hit the Mountain Laurel. If the plant was not put in a hole with dirt amended for drainage, such as the addition of compost, decomposed granite or sand to the native soil, the sudden addition of more water may be drowning the tree.

Next, determine if the tree is really dead, using the thumbnail test. Starting on a limb as high as you can reach, scratch a thin sliver of bark off with your thumbnail. If you find a thin layer of green beneath that bark, that limb, at least, is still alive. If there is no underlayer of green on the first limb, work your way down the tree. If you get clear to the base, close to the roots, without finding green, the tree is probably gone. While you are doing that, look around for caterpillars or webs, even wilted leaves, which could indicate an insect problem. If you find some green area, while other limbs do not have that green layer, start by pruning off those dead limbs. This will take some strain off the tree as a whole. Do not fertilize. It seems that gardeners sometimes think a good dose of fertilizer will cure anything, including lightning damage. Actually a tree under stress, which yours obviously is, should never be fertilized.

Now that you have discontinued the overhead watering (you have, haven't you?), water the tree by sticking a hose deep down in the dirt close to the roots and let the water dribble until water appears on the surface. Do this no more than once a week, less if we are getting regular rains (not likely!)

One more bandaid that you could put on the tree is to spread a good quality shredded hardwood mulch on the root area. About two to four inches is good, but not up against the trunk, where it could cause insect or fungal damage. This will protect the roots from heat or cold and, as it decomposes, improve the texture and drainage of the dirt.

 

From the Image Gallery


Texas mountain laurel
Sophora secundiflora

Texas mountain laurel
Sophora secundiflora

Texas mountain laurel
Sophora secundiflora

More Compost and Mulch Questions

Freeze damage to esperanza in pot from Brady TX
December 10, 2009 - My esperanza, currently in a container, has suffered some freeze damage. I have prepared a planting spot for it and am not sure whether to plant now, trim it back if I do plant it, etc. I would appr...
view the full question and answer

Severely cutback sloping soil in Dripping Springs TX
May 09, 2010 - We have 5.5 acres off Henly Loop just north of Hwy 290 about 10 miles west of Dripping Springs, TX. The former property owners carved out soil from a sloping area to get soil for the driveway. Doing ...
view the full question and answer

Native plants for poorly drained clay soil
March 24, 2008 - I am trying to establish a native plant garden in my back yard, I have two places where water stands for a few hours after a heavy rain, and the soil is black clay. Can you recommend any perennials 3...
view the full question and answer

Problems with Texas Ash and non-native Bradford Pear in Hutto TX
January 27, 2011 - We have planted two trees in our back yard. The first one(a Bradford Pear) died and the second one (a Texas ash) doesn't look like it's doing very well. Our back yard is mostly black clay about 1 f...
view the full question and answer

Deer-resistant groundcover for New Braunfels, TX
September 24, 2011 - Could you recommend some deer resistant ground cover plants for the New Braunfels area? We have tried Ajuga and Katie's Ruellia and they have been eaten.
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center