I always stick to culinary lavender—definitely don’t use decorative or scented kinds, just to be safe.
If I want it less sweet, I add the lavender syrup a little at a time and taste as I go.
Sparkling apple cider can replace both the still cider and sparkling water, but I keep an eye on the sweetness.
I usually make the lavender syrup up to a week ahead and stash it in a jar in the fridge.
For bigger groups, I double the recipe and let everyone add their own sparkling water and ice, so it stays bubbly.
Honestly, the drink is best when it’s cold and freshly mixed.