According to the 1992 Census of Agriculture, California, Oregon, and Washington reported 76 percent of the harvested U.S. raspberry acreage. California and Oregon accounted for 69 percent of the harvested U.S. blackberry acreage in 1992, and were also major producers of boysenberries. Oregon is the main producer of loganberries. The remaining bramble fruit production is scattered in small plantings throughout the United States. Raspberry and blackberry plants have perennial roots and biennial shoots.
Canes produce vegetative growth the first summer and form flower buds in the fall.
These buds bloom the following spring and bear fruit during the summer. After bearing, the canes die, completing their life cycle. Some red raspberry varieties are distinguished by their ability to initiate flower buds on primocanes during their first summer and produce fruit that fall. Except in the western commercial production areas, brambles tend to be grown in small plantings. The U.S. Census of Agriculture reported 4,639 farms with 15,899 harvested acres of raspberries and 2,619 farms with 6,994 harvested acres of blackberries in 1992.