Add the sugar, rose water, and water to a saucepan. Turn the heat to medium and stir until dissolved.
Bring to a boil, then reduce to a simmer. Simmer for 2 minutes.
Remove from heat and let it come to room temperature. Transfer your rose simple syrup to a sealed container and keep in the refrigerator until ready for use. Keeps for up to 1 month.
Notes
* If using dried rose petals instead of rose water, you will need 1/2 cup of petals and 1 cup of water. Add the sugar and water to a saucepan. Turn the heat to medium and stir until dissolved. Bring to a boil, then reduce to a simmer. Simmer for 2 minutes. Add the dried rose petals and steep off the heat for 30 minutes. Strain to remove the petals, then transfer your rose simple syrup to a sealed container, and keep it the refrigerator until you want to use it. This also keeps for up to one month in the refrigerator.