Early spring is the best time to apply a grass-selective herbicide. For best control with these herbicides, make the first application in spring when new bermudagrass growth is less than 6 inches in length, then re-apply the herbicide before the regrowth reaches 6 inches again.

How do I permanently kill Bermuda grass?

The best way to kill Bermuda grass is to choke it out, solarize it, or use a selective herbicide. Spot treating for small invasions can also get rid of Bermuda grass weeds fast. I've seen great results after applying a highly effective selective Bermuda grass killer such as Ornamec 170 Grass Herbicide.

What temp kills Bermuda grass?

In general, temperatures below 30°F kill the leaves and stems of bermudagrass. Research has demonstrated that bermudagrass will continue to grow with night temperatures as low as 34°F if day temperatures are near 70°F. However, when average temperatures drop below 50°F growth stops and the grass begins to discolor.