They can be veryyyyy invasive once established..
Either by birds picking the berries and then dropping them or p@@ping them out along thier paths..
And just at the base of the
plant or it's growth's reach.. the berries fall and you get alot of volunteers....
And it grows like 20ft in a season...
I don't have one, but watched a program where the lady did a gardening show from her home, *Kathy Renwald from Canada* and she liked the vine, but if she knew how it spread and grew... she might have thought twice about it*