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 - July 29, 2009

From: Austin, TX
Region: Southwest
Topic: Watering, Trees
Title: Watering oaks during drought in Austin
Answered by: Barbara Medford

QUESTION:

Should we be watering our live oaks and Spanish oaks during this drought? How often and how much?

ANSWER:

There is no question that even old, well-established trees are going to need some extra help during the kind of drought we are having right now. There are several reasons this is so, as you will see in the Texas A&M AgriLIFE article Do Trees Scream Silently During Droughts?

This University of Illinois Extension website Dealing with the Drought affirms that watering even drought-resistant trees like the oak is essential. It points out that a 90 ft. oak tree will be a lot worse to lose than annual flowers or vegetables. We don't recommend watering at the base of the trunk, but watering farther out, with a hose or sprinklers, probably about every two weeks. An excerpt from this website will tell you why:

"Our 90-foot oak example could have roots at least 40 feet beyond the tree’s
drip-line. The same goes for most shrubs. So, apply water at the tree or
shrub’s drip-line, not at the trunk."

Those roots may be pretty deep, and part of the protection of the trees, but much of the root system is in the top 12 inches of the soil. So, putting the water out there helps to avoid fungus and rot at the base of the trunk. 

 

More Trees Questions

Identity of tree with fragrant yellow flowers and thorns
June 06, 2013 - I'm not sure if this is a native plant. It's a tree, around 15" tall. The leaves are in bunches with 3-4 very sharp small spines at each bunch. Flowers are small, yellow, hang down from the leaf...
view the full question and answer

Will wax myrtle (Morella cerifera) grow in Roswell NM?
September 29, 2011 - We live in Roswell, NM. Will a wax myrtle tree live in our climate and soil?
view the full question and answer

Selection of native trees to replace trees lost in hurricane
September 28, 2008 - Hello, I have a tree replacement list I must choose from as I live in a HOA deeded area. I lost 2 pines to the hurricane. And according to them I need to replace with 2 large trees. The pines were 15 ...
view the full question and answer

Existing live oak taking over in Monahans TX
March 22, 2011 - I have just purchased a home with a huge Live Oak tree in the front yard. The previous owners have over the years allowed the sucker roots to grow unchecked. The tree is shading most of the lawn (di...
view the full question and answer

Drought resistant flowering plants for Spring, TX
January 25, 2012 - Hi Mr. Smarty Pants. I live in Spring Tx. and wanted to plant a garden in my front yard. I'm looking for flowering plants that are colorful, easy to manage, and drought resistant but so far can't fi...
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