Native Plants
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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
rate this answer
Sunday - April 25, 2010
From: Myrtle Beach, SC
Region: Southeast
Topic: Non-Natives
Title: Ridding non-native centipede grass of native rattlesnake weed in Myrtle Beach SC
Answered by: Barbara Medford
QUESTION:
How do I get rid of "rattlesnake weed" in my lawn of centipede grass in Myrtle Beach SC?ANSWER:
This puts us in a slightly embarrassing position. The Lady Bird Johnson Wildflower Center is dedicated to the use, protection and propagation of plants native not only to North America but to the area in which it is being grown. Your "weed," Hieracium venosum (rattlesnakeweed) is native to South Carolina, while your lawn, Ischaemum muticum, Centipede Grass, is native to China and parts of southeast Asia. Turns out both plants are considered by some to be invasive in nature. One source said that centipede grass can become a weed in many annual and perennial crops and can develop into huge thickets in drainage canals and ditches.
However, to you the rattlesnake weed is the invasive. We have no personal experience with it (but we do with rattlesnakes!) but from the information we have it looks pretty hard to pull out, which is always our first choice in getting rid of something like that. Preventing it from blooming, so it cannot set more seed, is the first line of defense. As those blooms stand up pretty high off the ground, getting them mowed early will certainly help.
Much as we hate to prescribe herbicides, because of environmental reasons, that may be your last resort. Centipede grass is a monocot, like all grasses. Rattlesnake weed is a dicot, also classified as a broad-leaf plant. You can buy herbicides specifically for either; obviously, you want one for a dicot, or broad-leaf plant. Read the instructions carefully, and follow them closely. Broadcast spraying could, with a gust of wind, damage some shrubs, flowering plants or trees, because they are dicots, also.
Conclusion: Prevent the Hieracium venosum (rattlesnakeweed) from seeding if you can, pull it out of the ground when it's possible, use a dicot herbicide as a last resort. But mind the rattlesnakes!
From our Native Plant Image Gallery:
More Non-Natives Questions
Non-native Indian Hawthorn leaves yellowing
March 15, 2009 - I live in Mississippi. My Indian Hawthorn's leaves are not as green as they were when I purchased the plant, and several are turning yellow with brown spots on them. What should I do?
view the full question and answer
Care of non-native potato tree (Solanum macranthum or Lycianthes rantonnetii)
June 20, 2009 - I live in Phoenix. I bought what was called a potato tree. Purple flowers with blooms quite often. It seemed a little puny and twiggy so I fed it Miracle Grow. It is now gorgeous with lovely leave...
view the full question and answer
Care for non-native ice plant in Virginia
October 12, 2008 - Regarding the ice plant in Virginia - do you cut it back or just trim or just leave it alone before winter?
view the full question and answer
Teucrium resistant to Verticillium Wilt?
April 20, 2015 - Is Teucrium frutescans, or Bush Germander resistant to Verticillium Wilt? I cannot find it on a list anywhere.
view the full question and answer
Problems with non-native hollyhock in Austin
April 03, 2010 - Our hollyhocks develop small yellow spots on the leaves; these eventually spread into little swellings on the underside; I think of them as lesions. They spread and the leaf turns brown and shrivels ...
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |