Bring sugar and water to a boil in a saucepan. Reduce to simmer and stir constantly until the sugar dissolves. Add 3-4 sprigs rosemary and remove from flame.
Allow this to cool completely
Make Lemonade
Combine 1 cup of lemon juice and 1 cup simple syrup in a pitcher.
Add 2-3 cups water and 1 tsp salt. Stir well.
Add more simple syrup or water to reach desired sweetness.