Host an Event Volunteer Join Tickets

Support the plant database you love!

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

Saturday - April 03, 2010

From: Manchaca, TX
Region: Southwest
Topic: Transplants, Trees
Title: Tree transplants having problems in Manchaca TX
Answered by: Barbara Medford

QUESTION:

I have recently transplanted a Mexican Buckeye, Chinquapin oak, and Sandpaper tree that I have been raising inside since they were seedlings. They have now developed a browning of the tips of their leaves. The buckeye's leaves are turning black while the other two are browning on the tips. Please help. Is a bug, not enough watering?

ANSWER:

Ungnadia speciosa (Mexican buckeye), Quercus muehlenbergii (chinkapin oak), and Ehretia anacua (knockaway) are all native in or near Travis County, so you don't have your trees in the wrong area. Since we are not plant pathologists and can't actually see the tree, this is going to take some detective work, and you will have to be the detective.

First, when you say you transplanted these trees recently from a sheltered environment, how recently? Was it last week, a month or so ago in the midst of our cold snaps or last summer when we were having record heat? Since all three are showing signs of stress, the problem may be the same for all three. Coming from being grown indoors to the much less forgiving environment of outside, they could very likely  be suffering from transplant shock. Transplant shock is a pretty broad category and could be caused, at least partly, by sudden temperature changes, by putting fertilizer in the hole where it would shock the little roots, or by planting them in a poorly-draining clay soil.  When you asked if there had been not enough watering, with the recent rains we have been having, that seems unlikely, but if the soil is not draining, the roots could be drowning. 

As for insects, have you seen evidence of any insect activity? Holes, swelling on the leaves, tiny spots on the underside of the leaves? We will give you websites that have pictures and can tell you a little about some of the most frequent bug villains to threaten new young growth. Don't, please, go to the nursery and ask for a spray. That could hurt the young trees far more than any possible insect. Many insects can be controlled with a spray of water on the leaves. This early in the season, we think you can discount insect damage, but it doesn't hurt to check.

Possible Insect Pests: 

University of California Integrated Pest Management - thrips

University of Minnesota Extension - scale insects

University of Missouri Extension - whiteflies

University of California Integrated Pest Management - aphids

Colorado State University Extension - spider mites

Finally, on the watering: stick your finger down in the soil around the tree roots and see if it feels very dry, nice and moist or very wet. If it feels nice and moist, and not compacted, leave it alone, it's fine. If it feels very wet, the drainage is probably bad, don't water it. You might try putting some good quality shredded hardwood mulch on the soil. That will protect the roots from heat, and as it decomposes, add some more organic material to the soil to assist with the drainage. If the soil feels loose but is dry, stick a hose way down in the hole, and let it run at a slow dribble for an hour or so or until water appears on the surface. If the water stands on the surface for more than thirty minutes, we're back to the drainage problem. 

So, what to do? Unless you discover an obvious insect or water problem, it still looks like transplant shock. You didn't say how tall the trees were or if there were any healthy leaves, but try trimming off about 1/3 of the upper portion of the tree, leaving some leaves for providing nourishment to the tree. Remember, no fertilizer until the trees seem well-recovered. Fertilizer would force the tree to try to put on new growth, which would be even more stress on an already-stressed tree. Trimming some of the upper growth will, again, take away some of the stress on the roots. Beyond that, since these are all trees native to this area, there is hope that they will adapt and grow up to be big native trees.

From our Native Plant Image Gallery:


Ungnadia speciosa

Quercus muehlenbergii

Ehretia anacua

 

 

 

 

 

 

More Trees Questions

Growing Chilopsis in Florida
July 25, 2013 - I live in St. Johns County, FL between Jacksonville and St Augustine. I live inland, not near the beach. I bought a small desert willow plant in Victoria, TX and brought it back to FL to grow. I plan ...
view the full question and answer

Webbing on oak leaves and fuzzy yellow growths on leaf veins
November 09, 2010 - I have a large red oak(?) and live oak that appear to have the same problem. Clumps of leaves all over the trees are covered by fine webbing and the leaves appear to be curling up and dying in the we...
view the full question and answer

Trees for creek side in Illinois
July 04, 2008 - I have a creek that runs along my back yard, and was wondering if you could give me some suggestions on water loving trees to grow next to it. The creek gets sun all day and is located in zone 5. (so...
view the full question and answer

Landscaping plant for Austin
September 01, 2011 - Great site! Have gotten lots of ideas. We're about to start construction on a fairly major landscaping project: raised beds/privacy screen. We're at the top of a hill in the Hill Country just wes...
view the full question and answer

Why will my Butternut trees not produce nuts in Tennessee?
May 06, 2009 - I have 2 butternut trees planted about 20 ft from each other. I see the long blossoms on each tree but I have not gotten any nuts from either tree. I do not know if I have a male and female or if th...
view the full question and answer

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