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?


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

Tuesday - June 28, 2011

From: Plano, TX
Region: Southwest
Topic: Non-Natives
Title: Will non-native St. Augustine crowd out non-native bermudagrass in Plano TX
Answered by: Barbara Medford


I have Bermuda sod via builder, looked great for 3+ years. then had crack house neighbors max weeds for 2+ years. Killing them (the weeds) had a toll on the grass. Now a fifth of the LOSER neighbors are putting down St Augustine and it is rampant. Should I give in and let it rule? The only thing that hurts it is Image crab grass killer, but again it puts the hurt on the bermuda.


Some of your problems Mr. Smarty Plants is not equipped to deal with, but we can help you out with the grasses. First, please step away from the spray can. Image is a post-emergent killer of broad-leaf weeds, which means it not only won't kill the St. Augustine, but can't get at the underground stolons of both grasses. Meanwhile, applications of too much is only polluting your soil and will eventually be washed away to drain into the water supply

Now, the Lady Bird Johnson Wildflower Center is committed to the growth, protection and propagation of plants native not only to North America but to the area in which those plants grow natively. Both grasses you are dealing with are non-native, and we would not recommend either of them. On the other hand, you seem determined to have a conventional lawn, for which there may not be many good native choices.

To answer your main question, will the St. Augustine crowd out the Bermudagrass? Not likely. We don't know what the sun and shade situations in the adjoining yards are, but St. Augustine is often used because it can tolerate shade. It also requires more water than most lawn grasses. Bermudagrass, on the other hand, can survive without so much water and does not thrive in shade. So, if your lawn is in the sun and you don't over-water it, the St. Augustine is not going to be able to compete with the Bermudagrass. And, even if it does, they are both grasses, they are both green. Just mow them and don't stress out so much.

One last word on your Bermudagrass-it is considered one of the worst invasive weeds in the South, so it's just as well you like it, you're probably going to keep on having it.


More Non-Natives Questions

Information about non-native Feijoa sellowiana (pineapple guave)
April 01, 2010 - Does a pineapple guava thrive in Austin, zip 78735? What height does it grow and what watering is needed?
view the full question and answer

Propagation of non-native Jerusalem Sage from Marble Falls, TX
October 11, 2010 - What is the best way to propagate Jerusalem Sage? I've located a plant and I want to get some going.
view the full question and answer

Strange produce from non-native lemon seed in Houma LA
April 03, 2010 - I grow a lemon tree from a seed. I grafted it from the same tree a year or so later. It is 15 years old and it only produce one year. The question is, the year it produce, the fruit was a pink grap...
view the full question and answer

Differences between Desmodium and Lespedezda
June 19, 2014 - i am trying to determine the difference between lespedeza and desmodium in my full sun wildflower and tall grasses meadow. There appear to be a number of different types of these plants, and they are...
view the full question and answer

Transplanting non-native bougainvillea in Florida
February 10, 2009 - Hi, My neighbor has two established bougainvillea that he is giving me..I just have to dig them up and not kill them..what is the best way to dig up and transplant them?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2015 Lady Bird Johnson Wildflower Center