General Characteristics: Thornless Boysenberry is a trailing plant that requires a trellis. Deciduous. Rapid growing canes to 5 to 6 feet long. A boysenberry is a cross between a blackberry, red raspberry and loganberry. It was discovered by Rudolph Boysen, and first commercially cultivated by Walter Knott. When asked what they were called, Knott said, "Boysenberries". As their popularity grew, Mrs. Knott began making preserves which ultimately made Knott's Berry Farm in Buena Park, California world famous. Large maroon berries resembling raspberries with the flavor of wild blackberries. Delicious eaten raw or cooked. Good for canning, freezing, fresh. Remarkably drought resistant. Self-fertile. Tolerates dry conditions. With plenty of cropping, the strength of plant is very vigorous.
Boysenberries, like dewberries and loganberries are a trailing type of blackberries. Plants grow horizontally, compared to the erect habit of most blackberries. To grow, most plants are tied to supports or wires to limit their trailing habit. Fruits are sweeter, ripen sooner and are in looser clusters.