To make the rose tea maple simple syrup.
Place the rose petals and boiling water in a heat resistant measuring cup. Let it soak for 15 mins. Drain well to extract all the liquid. Stir in maple syrup and mix well.
Pour grapefruit juice evenly into 3 glasses, add 1/4 cup of rose tea maple simple syrup to each glass. Top with ice cubes and a float of rose petals, grapefruit slices and rosemary. Enjoy!