@James, there are a few other areas I can garden, but this stuff is creeping into the lawn and taking over. I'm afraid to let it get any more out of control than it is. I also want to keep my old lilac and ninebark from dying, the birds really love the hiding in them and waiting for a turn at the feeder. I've never seen many bees or pollinators with the ivy, as there aren't any flowers, but they do congregate at my mint and sage patches that I let go to flower. @Jay, the power washer idea is brilliant! We have a portable washer, and I can certainly give this a try! We are in an old city, so having a garden of any kind is a bonus here. Our last house further downtown we had 12ft by 10 ft wood deck (width of our rowhome). Here, our backyard is roughly 50 ft by 70-75 ft. Not sure if I can get my hands on any pond liner, but I have a box of black contractor bags I could try if needed, not great, but we aren't leaving the house much right now, and urine is, ahem, free and plentiful. Edit to say, I hadn't seen Marco's response, but we have a propane torch for weeds too, so that is something else we could try!