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We have large beds of iris infested with a thorny vine called greenbrier. How can we get rid of this weed?
Last Updated: December 17, 2007
This vine is probably a member of the Smilax (greenbrier) family, and because it spreads by underground tubers, it is hard to kill. Cut the vines down and when they begin to regrow, spray (or paint) a broadleaf weed killer on the leaves. Also, if you cut the vines near the ground and paint the cut portion of the stem with the broadleaf weed killer or one of the herbicides sold as "brush killer" some of the vines will be killed. Several applications of either method will be required to eradicate the vines. The only sure method is digging out the tubers.
Contact your local Extension office for herbicide recommendations.
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