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
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 Trees Questions

Possible freeze damage to Texas Persimmon in Fair Oaks Ranch TX
June 27, 2010 - I have a Texas Persimmon tree that is in a green belt. It has leafed out and flowered for the eight years we have lived here. This year it leafed out then the leaves turned brown and dropped. The top ...
view the full question and answer

Neighbor's Arizona ash roots in Houston
September 30, 2009 - There is a huge Arizona Ash tree in my neighbor's yard. Its trunk is about 27 feet away from the foundation of my house and its foliage reaches my roof. I am planning to dig a trench on my side of t...
view the full question and answer

Problem with baldcypress tree
May 27, 2011 - Two of my three 20 year old Bald Cypress trees appear to have leafed out but are now brown in parts of the tree. The brown area is at the tops of the trees which are probably 40 ft. high. They were...
view the full question and answer

Best fertilizer for live oak trees in Central Texas
April 22, 2010 - What is the best fertilizer for live oak trees in Central Texas?
view the full question and answer

Trees that are non-toxic for horses
May 02, 2008 - I live in Ponder, Tx. We have some acreage and horses and wish to plant trees to afford some shade for the horses. Can you tell me what trees are toxic to horses.
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