Answer: That's a tough one. Some morning glory species are highly invasive and are considered noxious weeds in some states with alot of acreage devoted to agriculture (e.g., Ipomoea acuminata in California). Others are not the same species and are annual varieties (e.g., Ipomoea nil). They require
no more than yanking down the stems at the end of the season. Perhaps your neighbors could find an annual species (or you could "find" it for them) that would be less invasive. They come in all colors. Another possibility would be to sink the species they have in a 5-gallon container with no bottom right down into the ground. I do this with mints which are also invasive (but probably not as invasive as morning glory). The container acts to control the root system from spreading everywhere, but still allows for drainage. I hope one of these suggestions helps.
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