What to do about bermuda in a wildflower plot?
Our wildflower plot, about 1000 sq ft, was started in the middle of a large sunny bermuda and crabgrass lawn 2 years ago. We used round-up to kill the grass in November and then planted by broadcasting seeds. Our first 2 springs were gorgeous with poppies. The other wildflowers are coming along nicely. But the crab grass and bermuda is now growing in from the sides. We are just about to mow for the 2nd time this year. Does anyone have any info on what to do about the unwanted grasses in our wildflower plot?