Just bear with it for now and then attack it as soon as it warms up next year. Bermuda grass is a warm season grass. It will green up in late May when soil temperatures warm, and will turn a beige or straw color when frost hits in October. So if you have an invasion of Bermuda grass in your fescue lawn, it’s going to be very obvious!
Bermuda grass is a tough plant to eliminate. It propagates itself by rooting nodes along the stem and by underground stolons. To treat Bermuda grass, you have to use a herbicide, trying to dig it up is useless because very small pieces will quickly root and spread. A total kill herbicide like RoundUp will be effective, but it will probably take a couple of applications. (Be sure to follow the label directions carefully when using any herbicide!) Using a surfactant can increase the efficacy of herbicides when you are trying to treat Bermuda.
The problem that you face with controlling your Bermuda grass is timing. It is best to treat the grass when it is actively growing. The hottest summer months are the best time to treat. In the late winter and early spring, its growth is slow, so herbicides will be less effective. Your best bet is to treat in August, totally kill out the Bermuda spots (or the entire lawn if it’s really bad), and start over by reseeding in September.
If you have Bermuda in your established borders or flower beds, you’ve got double the problems since it will be difficult to do a total kill with a herbicide. You’ll need to use a combination of pulling and removal and spot treating with a herbicide. If you are diligent and remove or treat the Bermuda just as it sends up shoots, you will eventually eliminate its ability to photosynthesize and it will meet its demise.
There are a couple of things to keep in mind. One is that it is much easier to remove weeds (of any kind) that are young and small. Additionally, whenever you are using herbicides near valuable plants, care must be taken that the herbicide does not drift (by wind) or vaporize (by high temperatures) onto plants that you want to keep because small amounts of herbicides can cause damage.
It can be discouraging but is possible to eliminate Bermuda from beds (I’ve done it!).
In The Garden,
Cindi Sullivan