In a small saucepan, combine the dried hibiscus flowers and water.

Heat the saucepan over medium-high heat until it comes to a boil.

Once boiling, reduce the heat and let it simmer for about 10 minutes.

After simmering, remove the pan from heat and strain the mixture through a fine mesh strainer or cheesecloth.

Return the strained liquid to the saucepan and add the granulated sugar.

Stir over low heat until the sugar completely dissolves.

If using, add the lemon juice now and stir well.

Remove the syrup from heat and let it cool to room temperature.

Transfer the cooled syrup into a glass jar or bottle and seal tightly.