Hello - I have a patch of hellebore that is now spreading into the woodland that it borders. I don't see hellebore on the invasive plant list, but should I worry about this spreading? I used to think that the lack of sunlight would stop the spread but that doesn't seem to be the case. If that is true and it will continue to spread, I will pull it out. I don't want to crowd out all the native plants. In addition I have a lot of wineberry that continues to spread along the woods/lawn border. I'd like to get rid of some of it but even if I dig it out it just comes back. Is the only solution chemicals? thank you for your help!