How Can You Kill Weeds in St. Augustine Grass without Killing the Grass?
Call 281-431-7441 for the best grass sod in the Houston area at very competitive prices. Do you have weeds in your St. Augustine grass lawn? In this video, Houston Grass South Owner Michael Romine talks about how to kill weeds in St. Augustine grass without damaging your lawn.
Here’s a summary of Michael’s video on how to kill weeds in St. Augustine grass:
How to kill weeds in St. Augustine? There are lots of different kinds of weeds. Some easier to kill than others.
If we’re going into springtime coming out of winter and going into springtime you get lots of clovers. We just classify them as the winter weeds that come up and we have found, and in my own yard, I put out Scotts Bonus S. It’s a fertilizer that’s been impregnated with a chemical that is a fairly, good weed killer as well and if you put that out there, just like you do fertilizer, follow the directions on the bag and you put it out with your push fertilizer spreader. That is one way to clean up a lot of the winter weeds.
You get into some of the hardier weeds, pre-emergent herbicide I guess is probably the best way to control weeds. You put that out right before we go into springtime, right before the temperature warms up. Most of those pre-emergent herbicides are I believe are controlled and you have to have a chemical applicators’ license to apply them. So a TruGreen, or a Greenup or somebody like that has to… somebody with a chemical applicator’s license, has to come out and put those out.
Basically, they put those chemicals out in a liquid form and they form a barrier on top of the soil to where if any seeds of weeds are there or get put there in the future they can’t germinate because of this layer of pre-emergent herbicide is basically what they’re putting out. When weeds never exist obviously is the easiest thing.
The atrazine impregnated fertilizer for the springtime and then the heartier weeds there are lots of different things out there that you can buy off the shelf depending on the variety of grass that you have, but the with the hardier weeds like Dallas Grass, Roundup is usually the only thing that can do the job, especially once the weeds get very mature.
You can use Roundup just spot spraying. Roundup is a non-selective herbicide, they call it, meaning anything it touches it kills. So you would want to apply something like that on a day that’s not windy at all and it’s actually, the hotter the better it is outside the more it’s going to soak that chemical up and do its job.
The biggest problem in St. Augustine is Bermuda Grass, though. If you’ve got Bermuda Grass in St. Augustine, there is no selective herbicide that will kill Bermuda Grass out of your St. Augustine, without killing the St. Augustine. So when you have Bermuda Grass that’s so bad and it bothers you that you’ve got a mix of grasses out there the only way to get rid of it is to get Roundup and follow the directions on the packaging and usually we do the service as well.
We put it in a pump-up sprayer and put it in the concentrate and mix it with water and you spray every square inch of the area you’re trying to get rid of and wait about ten days and then you come in with either a weed eater or sod cutter and cut that out, that area out, and haul that off and then plant the new St. Augustine.
It’s a very laborious task and an expensive one frankly to do that as well, but it is unfortunately really the only way to clean the Bermuda Grass out of your St. Augustine. If you neglect to spray that Bermuda Grass with Roundup before you take it out with that sod cutter, the roots would stay in the soil and in six months to a year, the Bermuda Grass is actually going to reappear even if you use totally clean St. Augustine over it. So Bermuda Grass is a tough one to get rid of but we’ve had lots of success with doing it by that method.
Texas A&M has a world-class turfgrass research program and that Aggie Turfgrass website has extensive information to help you identify the weeds and the insects that may impact your Texas lawn. Please check this website for in-depth information about weeds and lawn insects.
Houston Grass South delivers high quality grass sod grown on the family farm in Bay City, TX. We’re located just off Highway 6, on FM 521 (McKeever Road) in Arcola, and we’re just a few miles east of Sienna Plantation.
You can pick up your grass sod at our office or we can arrange delivery. Please contact us at 281-431-7441 for more information and a quote for your sod or use our contact form to send us an email.