Rinse the dried sorrel thoroughly to remove any dust or debris. Peel and slice the ginger. Gather your cloves, cinnamon stick, and orange peel.
In a large pot, bring the water to a boil. Add the dried sorrel, ginger, cloves, cinnamon stick, and orange peel. Stir everything together, then turn off the heat and cover the pot.
Let the mixture steep for at least 2 hours (or overnight for a stronger flavor).
Strain the mixture through a fine sieve or cheesecloth to remove the solids. Discard the hibiscus petals and spices.
While the drink is still warm, stir in brown sugar or honey to taste. If adding rum, mix it in now.
Refrigerate for at least 2 hours until fully chilled. Serve over ice with a slice of orange or a cinnamon stick for garnish.
Notes
Let the sorrel steep overnight for a stronger flavor. Adjust sweetness based on personal preference. Add a splash of sparkling water for a fizzy version.