The problems start when wild grape vines grow out of control. Vines can climb the tallest trees, take over the light in a large area, and kill everything beneath a thick blanket of leaves. Under these circumstances grape vine behaves like an invasive plant and the resulting destruction to vegetation offsets the benefits.
|Wild grape at Riverfront Park, Glastonbury, September 2013. |
Also note some Japanese Knotweed in bloom in lower right center of picture.
Unfortunately what man is not good at is controlling the consequences of his actions, so wild grape vine can become almost as damaging as invasive plants like oriental bittersweet.
For more information go to Penn State Info