Heat filtered water and lavender buds over medium heat in a saucepan. Bring to a low boil and reduce heat to a simmer. Simmer for 5 minutes. Strain water into a jar to remove lavender buds.
Stir Reishi tea and honey into the water and cool to room temperature. Refrigerate for 30 minutes to 1 hour to chill the mixture. Pour over ice in a 16 oz. glass and top with coconut milk. Enjoy.