- Some believe this to be a red raspberry and blackberry cross while others think it is loganberry and blackberry cross. They all agree that it is vigorous, productive and easy to grow! Very large, narrow berries are reddish black when fully ripe and are perfect for preserves or topping ice cream and yogurts. Developed in Scotland they can be grown in sprawling clumps spaced 3-5’ apart. 2 year plants.