| Because of my son's autism and my getting older (54!), I've had to neglect one raised bed that has been completely taken over by trumpet vine, since it roots wherever it touches soil. I have a really good grass and weed killer. Would it be possible to take the thickest parts of the vines, cut them and wipe it on with a Q-tip to destroy them --- get a good start, at least?
The same questions I would ask about a wild blackberry vine that was volunteered by a bird, I'm assuming.
Depending on the particular product you have that may or may not work. An alternative would be to use a wiper to apply the weed killer to the leaves of the plants so other desireable plants nearby don't get it on them. Late summer to fall applications will be the most effective but I would not wait until then to start as repeated applications will most likely be necessary.
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