Last Updated: March 20, 2016
How to kill Bermuda grass
What it means to kill Bermuda grass
Because of it’s aggressive growth and persistent nature, Bermuda grass is very difficult to kill and eradicate. Continuous applications of herbicides are required to kill Bermuda grass. While Bermuda grass is well known for its aggressive nature and is used as a favored turf or lawn grass in many regions, it is this same nature that also makes it a weed for other grasses and plants. It is one of those grasses which can return even after it's dead.
Due to its extensive root system, Bermuda grass is very difficult to be killed and eradicated completely from a field where it has grown vigorously. The underground roots and the runners above ground spread everywhere. As a result even flower beds and other adjacent areas can also become affected. While trying to remove Bermuda grass, just getting rid of the roots will not solve the problem. Several applications of herbicide are required over a month to kill 90 to 95% of Bermuda grass.
Herbicide like glyphosate is very common for killing Bermuda. But remember, in order to get good results, herbicide should be applied (i.e. sprayed) on the grass leaves. This is because the leaves are the most effective part to absorb maximum quantity of herbicide and not the roots.
Another important point to remember is the time of herbicide application. In dormant state (like in January) Bermuda grass absorbs less herbicides. This is the time when they draw nutrients up from the roots and therefore the chemical applied on the leaves is unlikely to reach down to the root system. So this is not the time to kill Bermuda by use of herbicides. Application of herbicides should be done from spring to fall, when the leaves are fully developed and green.
You should not clip and mow the lawn before getting rid of Bermuda grass. Instead, one or two weeks before the application of herbicide, water the lawn thoroughly so that the leaves of Bermuda grass get green and well spread out to absorb the chemical effectively.
Glyphosate is a broad-spectrum systemic herbicide, and known in the market with commercial product names such as Roundup, Accord, Rodeo, Touchdown etc. It can kill most of the Bermuda vegetation. However, as mentioned earlier, it is not effective when Bermuda grass is in dormant state. Glyphosate can kill the deepest roots of Bermuda grass. After treatment, graying and browning of colors takes place within 7-10 days.
Read the labels carefully and follow the instructions for dilution, application method and even how to clean the spray equipment. You will need to repeat the herbicide application and watering of lawn every ten days or so until new sprouts of Bermuda grass stop reappearing. Apply herbicide on the entire grass area.
Soil particles that adsorb the herbicides, get transformed into carbon dioxide, nitrogen, water, phosphate and other common natural components. And by this it kills the Bermuda grass by stopping an important metabolic process.
However insects and animals are not affected by this. Bermuda grass can also be controlled by Turflon ester, another herbicide. You should spray it three times in 3-week intervals during the growing season (usually May-July).
Selectively Removing Bermuda From Other Grasses
The earlier method of applying Glyphosate (like Roundup etc.) all over the area works when you are trying to completely clean up your lawn. Remember, Glyphosate is NOT a selective herbicide and kills almost all plants including other grasses and weeds. So if your requirement is to eliminate only the Bermuda grass selectively while not affecting other desirable grasses, check out Selective Bermuda Grass Killers
to know about the selective herbicides that need to be used, the method of application and timing.
Removing Bermuda from flower beds & ornamental plants
There are some methods that you can use for spraying herbicides on Bermuda grass while protecting the wanted plants. I generally put up a low height partition between Bermuda grass and the desired plants using a piece of cardboard or thin plywood.
Now you can apply the herbicide by a pressure tank sprayer and create a fine mist on Bermuda grass. Or alternatively place a plastic sheet on the flower bed to protect them from the spray.
If there is space between wanted plants and Bermuda grass, a small paint roller and a pan can be used to kill the Bermuda grass. Keep the glyphosate solution in the pan and roll the moistened roller over the undesirable Bermuda grass.
Tank-type pressure sprayer can be used only in larger areas and isolated spots. Otherwise the spray can drift through the greenish bark of trees and shrubs. Even small amount of glyphosate can cause severe growth defects to all kinds of plants. You can also use Ortho Grass-B-Gon Grass Killer (Fluazifop-butyl) to kill Bermuda grass while avoiding injury of ornamentals plants like flower beds. Other types of herbicides like Grass-Getter, a post-emergent grass killer can also control Bermuda grass by repeated application.
Eradicating Bermuda grass before seeding Fescue
If you have a Bermuda grass area that you want to clean up before seeding fescue, you can follow these steps (Note: You should start about five to six weeks before overseeding with fescue, and also plan to do it between Spring to Fall.)
1. Mow the grass at 2.0 inches
2. Fertilize it with 1.0 lb. of nitrogen per 1000 sq. ft and water the lawn normally.
3. Spray the lawn in the morning with a Glyphosate variant like Round-up.
4. Let the spray dry off. Turn the irrigation off for that night only.
5. Turn on the irrigation the next day and water normally.
6. In 5-10 days, (while you keep watering) 90% of the Bermuda grass will turn brown.
7. Apply another 1/4 lb. of nitrogen per 1000 sq ft. and cover the whole area.
8. If there are some patches that are still green, re-spray with Round-up (and repeat steps 3 and 4 for those green areas).
9. In another 7 days or so, all Bermuda grass should be killed.
3) Bermuda Grass
: A complete guide to Bermuda Grass and Lawn Care.
Viewers' Reviews & Comments
Dustin Majchen (April 2013)
It is actually best not to Rototill the soil after trying to get rid of Bermuda. Scratch the surface with a flat shovel or steel rake. If the glyphosate is still working in the plant you should not disrupt the roots. Although do not re plant grass right away due to the residual activity of the Glyphosate. To suppress the Bermuda there is a chemical available called Turflon. It will not kill the Bermuda but it will Suppress. You must spray a few times while the Bermuda is actively growing to keep it under control. Dethatching in your fescue lawns that do have Bermuda actively growing will be necessary.
Brian (January 2013)
Beginning the middle of August through mid October I used Ortho with Glyphosate to kill roughly 1700 square feet of very pesky and aggressive Bermuda grass. I'm planning to put down tall fescue sod down in the spring to match the rest of my yard.
Question..... Before putting the sod down should I till the soil containing the dead Bermuda grass or just lay the sod over the dead Bermuda grass?
Additional Question...... Should I treat the soil with a pre-emergence or something else before laying the sod. Looking forward to responses...
Raj - bermuda-attractions.com (January 2013)
Hi, after killing Bermuda, I would till the soil so that it gets loosened, then try to get the dead grass out of the soil as much as possible, and add a fresh layer of soil (like topsoil) before laying the sod to get best results. Regards,
Jesse R. Davidson (August 2012)
Two years ago, I noticed an area on each side of my driveway, where the grass looked completely different from the rest of my lawn. These areas appeared after reseeding around two trees (one on each side of the driveway) with Scotts Patch. The area re-seeded on each side was probably ten feet by ten feet. At first, I noticed an area about one foot by one foot in each re-seeded area. Over the year, these areas were spreading into the mulched areas around the trees. The following year, I could tell this stuff was starting to take over.
This year it had spread into an area of approximately twenty feet by twenty feet on both sides of the driveway. It was even pushing up through the cracks in my asphalt. Okay I thought, it's time to fight this stuff. First, I took a sample to the local landscaping company. They identified it as Bermuda grass. I was instructed on how to kill it, and was told to be aggressive in my attack. A week ago, I finished my fifth application of round-up. Yesterday, I was spot killing the few struggling plants that remain. I have been at this all summer, and I probably won't be able to re-seed until next spring.
I have been told that if only one plant survives, I will have the problem again. This stuff is from Hell, and I'm wondering if I will ever be free of it. My advice, if you ever end up with this in your lawn, don't wait on your attack. Hit the area while it's small, and hit it often.