
Lavender syrup is a flavored sweetener infused with culinary lavender in a sugar-water solution.
Dried culinary lavender steeped briefly in warm syrup and strained rebuilds it — briefly is the operative word, since over-steeping is what turns lavender medicinal. Elderflower or chamomile syrup keeps the floral register without the perfume edge.
Lavender bitters
Alcoholic, dashed, and dry. It carries the flower into a drink without the sugar, which suits a spirit-forward build that syrup would sweeten too far.
Ornamental lavender
Not the same plant as the culinary kind, and grown with no regard for flavor. There is a reason culinary lavender is sold separately: the ornamental sort turns a syrup soapy and camphorous.
Months sealed, a fortnight in the fridge once opened. The aroma is the first thing to go, and a faded lavender syrup is simply sugar.