En EspaŅol

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
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
2 ratings

Monday - December 22, 2008

From: Savannah, GA
Region: Southeast
Topic: Invasive Plants
Title: Absence of grass around a willow tree in Georgia
Answered by: Barbara Medford

QUESTION:

In the past three years my Willow tree has grown from a stick to a lovely tree. Unfortunately, the grass under and around the tree is gone. Nothing left but dirt. Is there a remedy?

ANSWER:

Three members of the Salix genus, or willows, are known to be native to Georgia- Salix caroliniana (coastal plain willow), Salix sericea (silky willow) and Salix nigra (black willow). However, it frequently happens that when we are asked about willows, it turns out they were weeping willows, which are non-native to North America. Salix babylonica (Floridata) is native to western China, although it has been used as an ornamental tree for many years in the United States. At the Lady Bird Johnson Wildflower Center we are committed to the use and propagation of plants native not only to North America but to the area in which they are being grown. Because native plants are already adapted to the conditions of rainfall, soil type and climate, they will need less water, fertilizer and maintenance. 

However, in this case, it really doesn't matter if your willow is native or not; your question had to do with the conditions underneath the tree.  Roots of all members of the genus are aggressive and will spread about 3 times the distance from the trunk to the edge of the canopy. They are messy, constantly dropping leaves and twigs, and are prone to many diseases which can leave them with dead areas and an unattractive shape. Groundcovers and grasses simply can't compete with those surface roots taking up all the nutrients, the heavy shade in summer, and the litter that has fallen from the tree. The willow roots also can damage sewer lines and lift sidewalks and paving, and are really suitable only to large properties, where they can be best seen from a distance. It would appear that you will need to accept the bare ground beneath the willow as you would most likely be wasting your time trying to plant more grass.


Salix caroliniana

Salix nigra

 

 

More Invasive Plants Questions

Walnut tree root coming through basement floor in Portland, OR
February 10, 2009 - I have a walnut tree root coming through my basement floor. I need advice as to what will it do to tree when I remove the root, like another root though a different part of my home. It is a large tree...
view the full question and answer

Information on non-native, invasive pampas grass
February 12, 2004 - Our neighborhood is doing a community landscaping project and pampas grass has been suggested. Is there a good article related to invasives that specifically mention pampas grass?
view the full question and answer

Winter weeds in Flower Mound TX
February 19, 2009 - My lawn is being overrun by winter weeds. How can I get rid of them? Should I wait until March when I put down weed and feed fertilizer?
view the full question and answer

Use of non-native pothos for outside wall from Las Vegas NV
January 05, 2014 - I am in Las Vegas, NV. I live in a cottage-style apartment so I have a north facing porch with no one on the west so I get some there (and have an inherited cactus probably a yard all round) I would ...
view the full question and answer

Non-flowering mimosas in Texas
July 08, 2008 - I have two mimosa trees, about 3 years old. Both were grown from volunteer seedlings. Neither have flowers nor have they produced seed pods. Are they too young or do they need a source of pollenation...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center