Vinca (Catharanthus), also called Madagasar periwinkle, is a popular summer flowering bedding plant. Soiree Kawaii® series of catharanthus hybrids from Suntory (C. roseus) continue among the favorites at California Spring Trials since their introduction three years ago. Vincas start blooming, and continuously thereafter, from spring planting to the first frost in autumn. Soiree Kawaii vincas perform […]