Sloe is the small, dark purple fruit of the blackthorn bush, scientifically known as Prunus spinosa. It typically grows in hedgerows and woodlands across Europe and parts of Asia. Sloes are known for their tart flavor and are often used in making sloe gin, a popular liqueur. The fruit ripens in late autumn and is usually harvested after the first frost, which helps to soften its taste. Sloes are rich in antioxidants and have been used in traditional medicine for their potential health benefits, including aiding digestion and reducing inflammation.