6640 - Roselle (Hibiscus sabdariffa) An edible hibiscus originally from southeast Asia. The dried seed pods have a variety of edible uses, most popularly in the flavoring of fruit beverages. The plant itself is ornamental as well, owing to its bright red stems and red veined leaves. Start Roselle seeds indoors in 4-6 inch pots. Germination temperature is at 80 degrees.It is important to not allow the plant to get root bound in the pot. Transplant after the last frost date. These plants can get very large. Plant 4-5 feet apart.