The boysenberry is a hybrid cross of blackberry and a berry called the Loganberry which is itself a hybrid cross of raspberry and blackberry. The Loganberry is named after a judge from California who was the first to make the hybrid cross in 1880. This Loganberry was crossed afterwards with a blackberry around 1920 by R. Boysen from where the name comes. For Danish Selection marmalade, boysenberries from New Zealand are used, where the climate is mild and suitable for raising the berry. Boysenberries are harvested in March.