is Boston ivy invasive as far as spreading into lawns or gardens?
I understand Boston Ivy grows vigorously vertically. I have not been able to determine if it grows everywhere.
It will grow horizontally for a short way in search of new places to climb, can be used as a ground cover, and is considered invasive in some places. It is native to North America. You might have to do some pulling to control it, and don't plant it if it's listed as invasive in your area. Check with the Extension Service if you're not sure. https://www.gardeningknowhow.com/extension-search/