Storage: Store edible violas in your refrigerator in their plastic clamshells until you’re ready to use them.
Shelf Life: 7-8 days.

Violas are one of the more tasty edible flower varieties, making them a particularly good choice as a dessert garnish or addition to salads. Most of their flavor is actually in the green bottoms of the blossom, so separated petals will be more mild.
Some edible flowers may wilt or change color when exposed to vinegar, so if using a vinegar-based dressing on salads containing edible flowers, test it on a few blossoms ahead of time and/or add it at the last second.
Violas float well in liquids, so they’re a great garnish option for cocktails, champagne, etc.
Edible Flower Recipes, Tips & Information