Answer: If planted in early fall into well prepared soil and kept well watered and mulched, the runners should root well enough to winter over successfully. (You should check them periodically for frost heaving, however.) The rooted plants in peat pots would be preferable for fall planting but are traditionally available only in the spring -- if a local nursery had "leftovers" they might pot them up into larger pots and sell them in the perennials section, in part because the peat pots desintegrate over the summer. Many mail order sources, including Burpee, only ship live plants in the spring. Good luck with your vinca!
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