Blueberries are perennial flowering plants with indigo-colored berries. They have a sweet taste when mature, with variable acidity. Blueberries can be eaten fresh or further processed in another dish. Often added to baking or used to make jam, the indigo skins of the fruit add colour to any dish. Blueberries also contain micronutrients with moderate levels of the essential dietary minerals manganese, vitamin C, vitamin K and dietary fibre.