I was just asking DH this past weekend, "Where did this English Ivy come from?" Oh yeah, he got 4-5 sprigs from the neighbor to grow over the arbor. And grow it did! I love it on our side of the fence where we have it somewhat controlled. But while in the forest behind the fence, I noticed it needs some attention before it takes over the forest! That, and Potato Vines. I think the squirrels planted those.