I, too, grow ‘Grandpa Ott,’ and it does seed regularly. Mine doesn’t seem to spread beyond a 5 or six foot radius, though. I pull out the young plants I don’t want and leave the others to grow through the support I have for them and through a Rosa rubrifolia right next door. This morning glory is a real treat with the rose’s blue leaves.
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Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.