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
Not Yet Rated

Saturday - September 02, 2006

From: Dalworthington Gardens, TX
Region: Southwest
Topic: Invasive Plants, Problem Plants
Title: Management practices to eradicate Johnson grass
Answered by: Nan Hampton

QUESTION:

Please suggest some eradication methods for Johnson grass. It is established in a field that I want to encourage native wildflowers/plants such as goldenrod, prairie coneflower, blue eyed grass, milkweed and bushy bluestem.

ANSWER:

Complete eradication of Johnson grass (Sorghum halepense) is a difficult task, but controlling and reducing its abundance is possible. The most effective way of eliminating it is to dig it up. If you have a small population, this is a possibility. To make it easier to remove, you should thoroughly soak the ground with water around the base of the plants. You must get all of the roots out of the ground or you will have new plants sprouting from them. You will have to be watchful and persistent about removing new shoots along with their roots when they appear.

If you have a large population of Johnson grass, however, rogueing it out may not be practical. You will probably have to employ several methods to eliminate it. The Nature Conservancy has an excellent article Element Stewardship Abstract for Sorghum halepense, Johnson Grass that discusses the grass and various management strategies. Illinois Nature Preserves also has an assessment of current management practices.

 

More Invasive Plants Questions

Flashing barrier to Bermuda in tree bed
September 16, 2007 - I'm building a 6-ft-diameter planting bed on a gentle slope on blackland clay, at the center of which I plan to install a cedar elm. I'm using the wedge-shaped stones from the home-improvement stor...
view the full question and answer

Getting rid of invasive Florida betony from Myrtle Beach SC
April 28, 2012 - How can I get rid of Florida Betony from my lawn and flower beds/ garden area. Garden area was thoroughly dug up and hand picked of all tubules last year at least a foot deep. They are much worse now....
view the full question and answer

Will non-native and invasive Mexican petunias grow under oak trees from St. Augustine FL
March 24, 2013 - Will Mexican Petunias grow under an Oak tree?
view the full question and answer

Have invasive plants no useful purpose from Anchorage AK
September 03, 2011 - Does the definition of invasive plants include that the plant has no useful purpose? Thanks.
view the full question and answer

Problems with pink oxalis in Austin
April 12, 2010 - I have a bed of pink oxalis. The leaves are turning rusty and withering. It is spreading. Can you tell me how to remedy this?
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center