Storage: Store fennel flowers in their plastic clamshell in your refrigerator.
Shelf Life: 5-6 days.

Removed from their stalks, fennel flowers make a beautiful, flavorful garnish for cocktails, beverages and sweet or savory dishes. For savory applications, try pairing them with
seafood, lamb,
wild boar, pork or
poultry.
Because the stems can be a little tough, we don’t recommend using them whole in food as an ingredient, but they could perhaps be minced or blended to break them down or muddled/steeped to extract flavor and then strained/picked out before serving.
Edible Flower Recipes, Info & Techniques