Contact Us Host an Event Volunteer Join

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
Not Yet Rated

Monday - March 03, 2014

From: Bertram, TX
Region: Southwest
Topic: Diseases and Disorders, Pests, Trees
Title: Sap dripping from redbud in Bertram, TX
Answered by: Barbara Medford

QUESTION:

Our multi-trunked Texas redbud has sap dripping down 3 of the trunks. It seems to originate from a very small crack in each trunk. The tree is just starting to show pink this week, and is about to bloom. Very healthy otherwise. We planted it 7 years ago.

ANSWER:

There are five members of the genus Cercis listed in our Native Plant Database, or which Cercis canadensis var. texensis (Texas redbud) seems most likely to be the one growing in Burnet County. This USDA Plant Profile Map shows it growing in Travis County, right next to Burnet County and obviously it grows in Burnet County as well, it just hasn't been reported doing so. We always try to ascertain if a plant is native to the area in which it is being grown. Follow this liink Cercis canadensis var. texensis (Texas redbud) to our webpage on it and note these growing conditions:

"Growing Conditions

Water Use: Low , Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Soil pH: Alkaline (pH>7.2)
CaCO3 Tolerance: Low
Drought Tolerance: Medium , High
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Well-drained, calcareous, rocky, sandy, loamy, or clay soils, usually limestone-based.
Conditions Comments: Drought- and cold-tolerant within its range. Give dappled shade when young. A selection called Sanderson is said to be the most drought-adapted Texas redbud cultivar."

Sounds like it belongs right where you are growing it, but if the sun exposure or water amounts in the soil are different in your garden, that could be causing some of the problem. So, let's look around for some other explanations for your problem.

Here is a previous Mr. Smarty Plants answer on drought stress to redbuds. After the kind of year Central Texas has had, there is almost undoubtdly drought stress. The redbud still does not need to be flooded with water, but watering once a week by pushing the hose down in the soil and letting it drip until it comes to the surface will help get water down to the roots where it is needed the worst.

From Ask.com Caring for Redbud Trees

From Top Turf, we found this website Insect Damage with some good pictures of insects and the damage they do to leaves. 

In the final analysis, we are gardeners, not plant pathologists. We are sure you realize that in the very difficult weather conditions we have been having the last couple years with drought and record heat as well as record cold, conditions are probably not normal. Insects that might ordinarily not disturb you could be forced to invade your trees. The trees could themselves be demonstrating stress. The people at the Burnet County Extension Office are more likely to have up to the minute information on what is damaging plants in the area, as well as something to do about it. The website we have linked you to has contact information, and may, indeed, have information on the site itself on what is disturbing your trees this season.

 

More Diseases and Disorders Questions

Overwatering and fertilization of whiteleaf manzanita
July 27, 2007 - Hi, I have an Arctostaphylos Dr. Hurd, southern California coast, several years old, 10 feet, that has a few large branches with yellowing and spotted leaves... also dropping many. causes? remedy? sh...
view the full question and answer

Green worms on salvias
October 12, 2008 - I recently bought a "salvia blue chiquita." Some leaves were yellowing, but full of flowers and still attractive. Have had it on my deck for less than a week and have found 2 tiny greenish "worms...
view the full question and answer

Carolina buckthorn and Neem Oil Spray Damage
April 27, 2015 - It's April, I have a Carolina buckthorn that seemed to be doing well, about 8 feet tall, about 2 years old in part shade. It was putting out new leaves about a month ago and seemed to have infestati...
view the full question and answer

Problems with non-native Chinaberry tree from Tucson AZ
September 05, 2013 - I have a 30+ year old Chinaberry tree and this year the branches are much sparser with leaves and there are a lot of small dead branches. Should I fertilize and what should I use? Thank you
view the full question and answer

Transplant rootbound tree now from Kerrville TX
June 10, 2012 - I purchased a Blanco Crabapple tree. Should I plant it now or wait until Fall? (It is currently rootbound.) Second question: Our Mountain Laurel has a dead trunk and one trunk has already died. I c...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.