I want to remove the ivy from the tree, so about 2 months ago I cut all of the vines on the base of the tree--basically created a "clear cut" circle about 1 foot up the trunk. cut off from the ground I expected the ivy on the tree to cooperate by dying out, and then I'd pull the dead vines off of the tree.
The ivy on the tree seems to be as healthy as ever. Is that a surprise? Can it live without access to the ground? Does that mean it's getting water/nutrients directly from the tree?
How should I go about removing/killing the ivy from the tree? I'm not opposed to applying Roundup or something similar, if I can do so w/o harming the tree.
Any recommendations would be appreciated.