Similar crosses produced the loganberry, youngberry, and tayberry. Boysenberry plants are large and vigorous with trailing, thorny vines, though a less productive, thornless type is also available. The fruits are very large, dark maroon in color, and exceptionally juicy and flavorful. Boysenberry is grown like other trailing blackberries. It has a biennial cane habit, meaning flowers and fruit appear on canes during their second year of growth.
Gardeners often use trellises to support canes and ease berry harvest.
When buying boysenberry plants, be sure to select certified, disease-free plants. Space plants 4 ft. to 5 ft. apart, with 8 ft. First-year canes, called primocanes, should be tip cut by 36 in. Later, new lateral growth on primocanes can be tip cut at 18 in. Primocanes need to be thinned each year to around 6 in.