It probably depends on the zone you’re in; but in zone 6 where I live, the only morning glory I’ve ever had return from seed is ‘Grandpa Ott’s.’ I’ve grown ‘Heavenly Blue,’ and several of the stripped types and they’ve never come back.
Perhaps you’ll get additional comment from other areas/zones to help you decide.
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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.