Madagascar periwinkle, Catharanthus roseus (Vinca rosea)

Quick facts and care essentials

• Warm-season
• Annual
• Full sun or partial shade
• Moderate watering

Phloxlike flowers bloom in shades of pink, rose, lavender, and white on plants 4 to 24 inches tall, depending on the variety. Thrives in hot conditions, whether dry or humid. Space 8 to 12 inches apart.

 

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http://www.sunset.com/garden/flowers-plants/madagascar-periwinkle-catharanthus-roseus-vinca-rosea-00400000012847/