Days to Germination:10-20 days
Viola tricolor. This heirloom favorite prefers to be started indoors and transplanted out. Ten to 12 weeks prior to the last hard frost, plant them in a good seed-starting medium at about 70°F. Cover the seeds well and firm them down, since they require darkness for optimal germination. Provide even moisture, strong light and good ventilation. Once established, thin plants to 2" to 3" apart and grow on at about 55°F. Prior to transplanting when 3" tall, acclimate the seedlings by gradually exposing them to outside conditions for 1 to 2 weeks. After the threat of a hard frost has passed, transplant out into fertile, evenly moist but well-draining soil in full to filtered sunlight. Space plants 5" to 8" apart in the garden. Their flowers are prized as candied garnishes, in summer salads or in ice cubes. Spring/summer flowering. Height: 12".