Combine the water, sugar, ginger, and salt in a saucepan. Bring to a gentle simmer and cook for 5 minutes.
Remove the saucepan from the heat.
Stir in the dried hibiscus, cover, and steep for 10 to 15 minutes.
Strain through a fine-mesh strainer without squeezing the hibiscus aggressively.
Cool completely, transfer to a clean bottle or jar, and refrigerate.
Notes
Storage: Refrigerate in a clean, airtight container and use within 2 weeks. Freeze small portions for up to 3 months.Serving: Start with 1 to 2 ounces per drink. Add fresh citrus to each glass instead of the whole bottle.
Keyword ginger syrup for cocktails, hibiscus ginger syrup, hibiscus syrup for drinks