When grown indoors as a houseplant they will bloom during the winter. Sow indoors 8-10 weeks before transplanting outdoors. May be sown outdoors in early spring or early fall. Germinate at 65-70 degrees Fahrenheit. Cover seeds lightly after sowing.
Darkness is necessary for germination.
Chill seeds for 3-7 days in refrigerator before sowing. Keep soil surface moist. Cover seed flats with black plastic or newspaper. Germinates in 10-15 days. Transplant seedlings in four weeks.