We grow edible hibiscus, Cranberry Hibiscus and Rosella/Roselle (Hibiscus sabdiffera) very easily in our climate. Here is a use for the sepals from the flowers of the Rosella.
Click on the link for the recipe.
Sorrel Drink
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The red sepals of the Roselle plant (Hibiscus sabdariffa) is commonly called sorrel in the Caribbean. The young leaves are great in salads, with a sour taste very similar to sorrel (Rumex acetosa), the vegetable of European origin (hence the common name.