I share a long border with my neighbour who does not care especially about the ground elder, and I can see his point of view to be honest as it's not necessarily unattractive along the side of our boundary and he's not much of a gardener. However it's doing what it does and I feel like I'm fighting a losing battle to keep it from completely overwhelming my side. The roots are all tangled up in some of my nicer plants and I'm just doing temporary control and digging it out where I can but it's a losing battle. Is there anything I can do to in terms of planting to fight back? If I can't eradicate it (and I don't think I can unless he decides to deal with it from his side too) is there anything I can plant that might crowd it out or at least hide it? The bed currently is mostly ferns, hostas and a couple of rhododendrons, some anemones and hardy geraniums, all doing well.