I just discovered, and pulled some Ipomea that had crept under, over or thru the 9' block wall from next door. It's a beautiful vine, but very sneaky. If you keep it, plant it in a large pot with a tray under it, and don't let the vine touch the ground or you will regret it forever. My Ipomea cairica isn't quite as bad, but requires weekly hair cuts to keep it under control.