01 - In a medium saucepan, bring 4 cups of water to a boil.
02 - Remove from heat and add the dried hibiscus flowers. Let steep for 10 minutes.
03 - Strain the tea into a large pitcher, discarding the hibiscus solids.
04 - While the tea is still warm, stir in the sugar until fully dissolved. Add honey or agave syrup if using.
05 - Add the lime juice and 3 cups of cold water. Stir well.
06 - Chill in the refrigerator for at least 1 hour.
07 - To serve, fill glasses with ice cubes, pour the hibiscus tea over, and garnish with lime slices and mint leaves.