Days to Germination:14-20 days
Catharanthus roseus. Vinca rosea. Widely adaptable, it is best started indoors 12 to 14 weeks before transplanting out after all danger of spring frost has passed. Sow seeds in a good seed-starting medium at 70°F with even moisture. Cover seeds completely, as darkness aids germination. For even moisture, cover flats or pots with plastic wrap until seedlings emerge, then discard plastic. Harden off seedlings by gradually acclimating them outside over 1 to 2 weeks. Carefully transplant out into rich, well-draining soil in full sunlight, spaced 10" to 12" apart. Water regularly and mulch to deter weeds and retain ground moisture. Heat and drought tolerant once established, it requires little care and will spread to fill allotted space. It is great for hanging baskets, planters and window boxes. Summer flowering. Height: 14" to 16".