Clausen Nursery located in Vista California carries a wide variety of blackberry bushes including Blacksatin, Dirkesen, Boysenberry, Siskiyou, and Olallie.
The Olallie black berry has the perfect blend of sweet and tart. It was developed in 1949 in Oregon but does great in southern California. These berries are famous for putting in recipies, such as pies, muffins, cheesecakes, and even on ice cream. They are a great source of vitamin A, C, calcium, potassium, phosphorous, magnesium and dietary fiber.