Ivy Roots
There are places where English ivy (Hedera helix) looks really nice. It’s also a very good ground cover for many situations. Nevertheless, I’m not a huge fan. In a city, where it can perhaps be contained reasonably well by paving, etc., it’s suitable. In the suburbs and rural areas it can really be an annoyance. This ivy is growing up a tree near my office and you can see how it grips its host. It will grow up into the tallest trees and eventually strangle them. It also covers the ground so completely that in often chokes out less aggressive plants (and there are only a few more aggressive). We’ve done our best to eliminate it from our yard and with a small patch that seems to reappear occasionally, we’ve succeeded. But we remain on DEFCON 3 or higher.