Sloe berries are small, dark purple fruits that grow on the blackthorn bush, scientifically known as Prunus spinosa. These berries are typically harvested in late autumn after the first frost, which helps to soften their tart flavor. Sloe berries are not usually eaten raw due to their astringency but are often used to make jams, jellies, and the popular sloe gin. The sloe berry is rich in antioxidants and vitamin C, making it a nutritious addition to various recipes. In addition to culinary uses, sloe berries have a long history in traditional medicine, where they were believed to have various health benefits.