Pour the white wine into a large pitcher, filling it about three-quarters full.
Add the sliced citrus, berries, and chopped apple to the wine. Gently toss or stir with a spoon to combine.
Stir in the simple syrup or honey, tasting as you go to adjust the sweetness to your liking. The mixture should smell bright and fragrant.
Crush the herb sprigs slightly between your fingers or with a muddler to release their oils, then add them to the pitcher.
Place the pitcher in the fridge and let the sangria chill for at least two hours, allowing the flavors to meld and the fruit to infuse the wine.
Just before serving, add a splash of sparkling water or soda to the pitcher for a lively fizz.
Give the sangria a gentle stir, then pour into glasses filled with ice. Garnish with extra herbs or fruit slices if desired.