Black Butte Blackberries Are Twice The Size Of Regular Blackberries With Fruit Growing Up To 2in Long & 1in Across! Rich, Full Flavoured Berries Are Borne On Strong Laterals From Late July Onwards.slender Yet Vigorous Supple Canes Will Need Some Support & Have An Open Habit Making Picking Easier.supplied As 2l Pot Grown Plants.