Walter Knott named them after Rudolph Boysen, who crossed blackberries… (David Karp / For The Times )
Bay Laurel Nursery (Marcia Guelff, Nancy Rice, Carolyn Gilman). Bareroot plants, shipping in January: Boysen, Thornless Boysen, Thornless Logan, Marion, Olallie, Siskiyou. 2500 El Camino Real, Atascadero; (805) 466-3406; http://www.baylaurelnursery.com.
Kincaid Farm (Robert and Patricia Poole), Redlands. Boysen and a few Young (end of May through late June or early July). Hollywood (Sunday), Redlands (Thursday, Saturday), Santa Monica (Wednesday) farmers markets.
Knott's Berry Farm. Boysen pies, preserves, sherbet, juice, concentrate. 8039 Beach Blvd., Buena Park; (714) 220-5200; http://www.knotts.com.
Moessner Farms (Mike Moessner), Tehachapi. Boysen fruits (early to mid-July) and jam. Santa Monica (Wednesday) farmers market; http://www.moessnerfarms.com.
Murray Family Farms (Steven and Vickie Murray), Arvin. Boysen, Logan, Marion, Olallie, Silvan, Siskiyou (late May to early July). Camarillo (Saturday), Hollywood (Sunday), Ojai (Sunday), Redlands (Thursday), Santa Clarita (Sunday), Santa Monica (Wednesday), Torrance (Tuesday, Saturday), Ventura (Saturday) farmers markets. Farm stands: 6700 General Beale Road, Arvin, (661) 330-0100; Copus Road and Interstate 5 (south of Bakersfield), (661) 858-1100; http://www.murrayfamilyfarms.com.
Nature's Flavors. Boysen juice concentrate, 1 quart for $38, online only. http://www.naturesflavors.com.
Pauma Valley Citrus (Laney and Lalo Villalobos), Pauma Valley. Boysen (June). Santa Monica (Saturday organic) farmers market.
Pudwill Farms (Randy and Pyongyun Pudwill), Nipomo. Boysen (late June/early July), Marion (July), Tayberry (July). Beverly Hills (Sunday), Calabasas (Saturday), Hollywood (Sunday), Santa Monica (Wednesday and Saturday organic) farmers markets.
T&D Farms (Doug Powell), Redlands. Boysen (late May through June), Marion, Tayberry, (mid-June to early July), Kotata (July). Beverly Hills (Sunday), Hollywood (Sunday), Redlands (Saturday) farmers markets.
Weiser Family Farms (Alex Weiser), Tehachapi. Boysen (July), Olallie (mid- to late June). Beverly Hills (Sunday), Claremont (Sunday), Hollywood (Sunday), Long Beach (Sunday), Santa Monica (Wednesday; Saturday Pico; Saturday organic), Pasadena (Saturday), Venice (Friday) farmers markets; http://www.weiserfamilyfarms.com.
Schedeen Farms (Tony and Julie Schedeen), Boring, Ore. Boysen, Logan, Marion, Obsidian, Olallie, Tayberry (July). Fresh berries and jams; jams available by mail order. Farm stands: 28150 SE Highway 212, Boring, Ore.; (503) 663-1960; 845 NE 10th St., Gresham, Ore.; (503) 665-4730; http://www.schedeens.com.