Native trumpet vine can send sprouts from its roots as far as 25' from….
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The mother plant. About all you can do is to encase the mother plant with some type of deep barrier 18-20” into the ground several feet away from its trunk. Then, hand-dig and remove all the now-severed sprouts or spray them with a broad leafed weedkiller containing 2,4-D in late spring or early summer.
