Yes, I'm considering the despised Roundup, but don't know
if it is effective on deep roots. The nursery doesn't always
have good answers; cynical view is that they want to sell stuff.
I had the vines taken out some months ago, and asked the
gardener to dig up the roots on each side of back porch.
He dug out a big root, and I naively thought that was IT.
Now I am finding more. I have dug up some, but am-
not strong enough for all. Besides, they are so invasive,
heaven only knows where they have wandered.
Question: Is Roundup effective on root systems?
(Note: There is no nearby vegetation that might suffer.)