I used the product Ortho Grass-Be-Gon with good success on some bermuda grass. The result was not immediate but it did work. I had a couple of clumps of iris in the area and sprayed one clump on purpose to see what would happen. The iris continued to grow and bloomed normally. I will check the area soon to see if there is any remaining bermuda grass and will use again. I have also used it to kill lawn grass in peonies and summer phlox.
