This vine is hardy to USDA hardiness zone 7b, it will not overwinter in more northern climates. Some people overwinter Manettia bicolor indoors as a house plant or in a cool greenhouse. Or you could try rooting cuttings and growing them indoors over the winter.
FAQ #29245
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I planted a candy corn vine (Manettia bicolor) this past spring on a trellis. Will it winter over? Do I need to do anything before winter?
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