I didn’t know it was invasive. I haven’t any advice except to say we had one for many years. It was in a place where it got in the way walking by so I regularly broke pieces off it. Early this year I stripped all the growth from the main trunk and we dug it out. Several days later I replanted it somewhere else, kept watering it and was surprised it started to sprout new growth. As my water butt is empty I don’t water and it has wilted. So it will be interesting to see if it perks up once we get rain.