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The botanical name of annual vinca plant is Catharanthus roseus and the plant is also known as rose periwinkle or Madagascar periwinkle. Actually the annual vinca plant is a versatile little stunner with shiny green foliage and blooms of white, pink, rose, red, salmon, or purple. The annual vinca plant isn’t frost-hardy, you can easily grow the plant as a perennial if you live in USDA plant hardiness zones nine and above. How do you start annual vinca from seed? Collecting the annual vinca seeds from mature plants isn’t difficult but growing them from seed is a little trickier. To learn how to grow annual vinca from seed visit is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to