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Hardiness Zone: 6b
Wanda from Church Hill, Tennessee
These vines are considered invasive in many growing zones. If you're looking to get rid of them, make sure you deadhead the flowers and collect the seeds to keep them from sowing voluntary seedlings. You can also try digging them out by the roots and pulling up any young shoots as they emerge (prepare to be persistent). Leaves can be sprayed with a 5-10% solution of vinegar, but be aware that this weed killer is non-selective and will kill or damage all plants it comes into contact with.
Ellen
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Believe me, you can't kill one of these vines.....it has taken over my patio fence, and regardless of how much I cut it back, it comes back with a vengeance every year.
I prune throughout the summer, too. Otherwise it gets unwieldy and tries to overrun the garden. It never seems to mind!