Answer: By vinca vine I assume you mean the cascading variegated vine usually sold in spring as starts for containers. This is a form of Vinca major and in my experience is actually quite hardy in zone 6 when planted in the ground. For this reason, a certain amount of freezing weather will not harm it. If it is in a container, however, I would bring it into a cool and bright but sheltered place such as a garage once the temperatures are steadily near freezing. (If your pot is made of terra cotta, be sure not to let it freeze as the pot will probably be damaged.) By keeping it cool, you can then set it outdoors again quite early in the spring without worrying about frosts. Good luck with your vinca!
Q&A Library Searching Tips