to order seeds: http://www.rareseeds.com/store/vegetables/roselle/
(Hibiscus sabdariffa) A valuable plant for making cranberry-flavored bright red beverages, jelly, pie and tea. Much grown in Asia and the mid-east as the flavor is wonderful. A tasty sauce can be made by boiling and sweetening the fleshy calyxes; the leaves are also used to make a drink. The entire plant of this Hibiscus is red and very beautiful. Start early, unless you live in the far-south. Citrus-flavored flowers are delicious on frozen deserts.
Recipe to make drink from the buds, seeds: http://www.thai-recipes-today.com/Thai-drinks.html