I have a lot of different grasses that were planted by a landscaper. There is one that seems to have become very invasive and gotten into all kinds of other perennials that I have. Are there certain grasses that are famous for this and should be avoided? I'm thinking it's from seeding rather than rizhomes because it's all over the yard. thanks,
Yes, some grasses spread by seeding from the seed heads (the few the birds don't eat!). The newly emerged tufts of grass are easily pulled, but if you let them go, the second season they are much harder.