Boysenberries are a cross between blackberries and raspberries. They are intensely flavored and aromatic. The thorn-less vines are fast growing and require support. The dark-maroon to purple fruit is good eaten fresh, canned or used for syrups. They are a bramble bush and will spread extensively if given the chance. Control can be implemented and growth encouraged with a trellis to cling to and pruning of the canes at the end of the year.