You can make the lavender syrup ahead of time. It keeps in the fridge for up to 2 weeks.For a stronger lavender flavor, let the syrup steep longer before straining.If you prefer a sweeter drink, add more syrup. For less sweetness, use less syrup or add more lemon juice.Try using Meyer lemons when in season for a unique flavor.For a fun twist, freeze edible flowers in your ice cubes.