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
2 ratings

Monday - August 08, 2011

From: Austin, TX
Region: Southwest
Topic: Watering, Trees
Title: Defining drip line on trees from Austin
Answered by: Barbara Medford

QUESTION:

When you say that trees should be watered at the "drip line," do you mean that literally? I assume that the drip line means at the outside edge of the leaves or branches. Does that mean that watering closer to the trunk won't help the tree, even if the grass or plants underneath do benefit?

ANSWER:

Sorry, we get so used to using certain catch words, we forget that not everyone speaks the same language. Watering anywhere around a tree during the kind of weather we are having is beneficial. When a tree is small and new, we recommend sticking the hose in the soil around the base and letting it drip slowly until water comes to the surface, at least twice a week. With a mature tree, not only would it be difficult to get that hose in there with all the roots, but there are roots extending far beyond that which need the moisture, too. Using the phrase "drip line" is just a quickie indicator, and not totally accurate. Remember that the roots of a large tree will often extend out a distance at least comparable to the height of the tree, which is usually much farther out than where the edge of the shade from the tree, or drip line, is established. Yes, run the sprinkler under the tree and not under the tree but still over the roots. The only caution we would make is to avoid getting the bark of the tree too wet, as this can invite fungi and diseases.

 

More Trees Questions

Desert willows not doing well in Navarro County, TX
May 16, 2009 - Planted 3 new desert willows , 3-4 ft.in February. Live in East Navarro County and soil is clay with slight slope to Richland Chambers lake area. Had a wet spring. These plantings appear not doing we...
view the full question and answer

Chilopsis linearis Bubba in Hunt TX
October 18, 2009 - I purchased 3 desert willows (label: chilopsis linearis) to create an oasis area around a fountain which is in the center of my circle drive. But I need one more. Now I can only find the "chilopsis...
view the full question and answer

Red maple a casualty of Hurricane Ike in Houston
November 21, 2009 - We have a 3 year old Drummond Red Maple, between the sidewalk and the street in front of our house, that fell during Hurricane Ike. We replanted it. I recently noticed that the bark is severely cracke...
view the full question and answer

Evergreen replacement for liveoaks with oak wilt in Austin
January 26, 2008 - One day after moving into our very first home and first home in Texas (just north of the Wildflower center in Sendera Southwest Austin) we discovered that all of our Live Oaks have Oak Wilt. After tre...
view the full question and answer

Is bald cypress native to Dallas area?
September 19, 2009 - There are 2 very large bald cypress trees growing beside one another at a park in North Dallas, and I was wondering if they were native or planted a long time ago by the settlers or something. They ar...
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center