First, rinse the Buransh flowers under running water to remove dirt or debris.
In a large pot, add the water and Buransh flowers, and bring them to a boil.
Let the flowers simmer for 10 minutes or until the water turns red.
Strain the liquid using a fine-mesh sieve, and discard the flowers.
Pour the strained liquid back into the pot, and add sugar. Mix firmly until all of the sugar has been dissolved.
Let the mixture cool to room temperature, and then add lemon juice. Mix well.
Transfer the liquid to a pitcher, and refrigerate for 1-2 hours.
If desired, serve the Buransh juice chilled with ice cubes and mint leaves.