Choose boysenberries that are shiny, plump, and firm. Avoid berries that are bruised or leaking. Pick when they are dark purple. Boysenberries do not ripen all at once; it takes about a month for them to all ripen.
Remove any moldy or deformed berries. Refrigerate boysenberries for up to one week in original package. Wash before using.
Freeze on a cookie sheet and then bag in freezer for up to 4 months.
Fat free, saturated fat free, cholesterol free, sodium free, excellent source of fiber, folate, and manganese. A good source of vitamin K.