No. Vinca Minor, also known as Lesser Periwinkle, originates in
Europe, whereas Vinca Rosea (correctly named Catharanthus roseus),
also known as Madagascar Periwinkle is endemic to Madagascar.
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Vinca minor 'Alba'
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15cm should be fine
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Periwinkle, also known as Vinca major and Vinca minor, will
survive snow in climates as cold as USDA zone 6.