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

Sunday - September 13, 2009

From: Waukesha, WI
Region: Midwest
Topic: Soils, Transplants, Watering, Trees
Title: Transplant shock in Chestnut Oak in Waukesha WI
Answered by: Barbara Medford

QUESTION:

Bought and had nursery install a 4" diameter, 16' tall chestnut oak. Watered it as instructed-every 2nd or third day-hose stream size of my pinky for 45-60 minutes. It was planted in July. Just last week the leaves turned yellow and then brown, some have fallen off. The location has very little topsoil and is limestone underneath, it is mulched. Do you think it is transplant shock? Is it already a goner? Will it survive a WI winter? The older/larger English oak planted at the same time, same conditions is doing very well--new growth continues to appear. Thanks!

ANSWER:

The first thing we do when we receive a question about specific plants is to research their nativity, so we can get accurate information. The Lady Bird Johnson Wildflower Center is dedicated to the use, care and propagation of plants native not only to North America but to the area in which they are being grown. We learned that Quercus prinus (chestnut oak) is not native to Wisconsin, but mostly to areas south and east of there. Quercus robur, English oak or white oak, on the other hand, is not even native to North America, but to temperate areas of Asia and Europe, so we will have no information on it in our Native Plant Database.

Since it is the Chestnut Oak about which you are concerned, let us refer you to this USDA Forest Service website on Quercus prinus. You should read all of it, but some points we were interested in is that it is naturally found in poor, dry, sandy or rocky landscapes, but is not suited to clay or poorly drained soil. Another consideration is that it is hardy from USDA Hardiness Zones 5 to 9a. The best we can tell is that Waukesha County is in Zones 4b to 5a (average annual minimum temperatures -10 to -20 deg), so it could be marginal there, but since you have not yet experienced cold weather, we can't blame the leaf drop on that. Cold hardiness is variable and even mature trees are sometimes killed by a hard winter freeze. We received this question from you on September 9, and have to assume that even though in Texas we were still having 100+ degree temperatures and are in extreme drought, it must be beginning to be Fall in Wisconsin. So the yellowing and browning of the leaves could be quite natural. We're not sure we would have tried to transplant a tree that large, especially in mid-Summer, even in Wisconsin, but that is hardly something you can undo. We wouldn't write it off as a goner, nor trim off upper growth as we sometimes recommend for transplant shock. Right now, it needs all the leaves it has to continue to manufacture food to be stored up in the roots for the winter. Will it survive a Wisconsin Winter? That depends on so many variables, like the condition of the roots when the tree was planted and whether or not there are severe freezes, that we really couldn't guess. 

Hopefully, the tree will pull through. We would just recommend that the next time you have a tree planted you select one native to your area and therefore well-adapted to your climate, soils and temperatures. We would recommend not trying to plant quite such a large tree, and always checking to make sure it is not rootbound in its pot. Any plant that has been in a sheltered greenhouse or plant lot location for some time is going to have shock when it gets out into the real world and real dirt. Always insist in a recently-dug tree and on removing the pot so you can check that it does not have roots wrapped round and round in the shape of the pot. Beyond that, check the drainage in your soil. As mentioned above, this tree does not tolerate clay soils or poor drainage very well. If, when you are doing your watering, the water stands on the soil a while, you probably have either clay soil or poorly draining soil or both. Drowning the roots can be a death blow to a tree already struggling. 

Pictures from Google

 

 

More Soils Questions

Deer resistant plants from New Braunfels TX
August 31, 2012 - I have a 1/2 yard covered by a tree, shady. Bermuda grass previous owner planted has all turned brown this summer. I don't have lots of money to work with but would love to landscape that side of fr...
view the full question and answer

Adapting to clay soils in British Columbia
April 11, 2006 - What can I use to break down the clay content in my flower bed. It has a high concentration of clay and I want to plant treat it so I can plant flowers in it.
view the full question and answer

Should I acidify my well water for native plants
July 15, 2008 - Should I acidify my well water for irrigation of native plants? There is not enough rainwater collection.
view the full question and answer

What hydrangeas can be grown in Austin?
June 02, 2011 - I was told that oak leaf hydrangea was the only hydrangea variety that could be successfully grown in Austin TX. My oakleaf hydrangea is doing great and I would like to plant other varieties. Can you...
view the full question and answer

Care of Ixora by lowering soil pH
March 24, 2007 - I have a bunch of Ixoras that the leaves are turning brown, before I pull them out, is there any kind of treatment to save them? I have used insecticidal soap several times but there has been no impro...
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 | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center