Answer: The answer depends upon whether you're growing the annual or the perennial type of morning glory. Ipomoea acuminata is a perennial in your gardening region and produces bright blue flowers that fade to pink. Ipomoea alba produces white flowers sometimes banded with green. It, too, is a perennial. These plants will die back on their own at the end of the season and can be trimmed down to ground level. They will produce new vines next spring. Ipomoea tricolor is an annual morning glory. The vines will wither and die at the end of the season. You can save seeds if you're growing an annual and want a repeat performance next year.
Sounds like the plant is thriving which indicates you're providing all the necessary sunshine and moisture your morning glory requires. Enjoy!
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