Prime-Jim blackberry variety
Second commercial cultivar of primocane-fruiting blackberry
Rubus subgenus Rubus Watson 'Prime-Jim'
Originated from a cross of Arapaho x Ark. 830
Variety denomination - 'APF-12'
Prime-Jim is the parent for Prime-Ark 45, Black Magic
Plants are thorny
Bushes have erect canes
Fruit weight is 5 g
Berries have a oblong shape
Fruiting habit - primocane-fruiting (everbearing)
Flowering on floricanes starts in the fourth week of April
Ripening date (regular) - first week of June
Blooming on primocanes starts in the third week of June
Ripening date (remontant) - third week of July
Productivity is 14000 kg from ha
Soluble solids - 7.9%
Acidity - 0.81%
Cold hardiness is moderate
Heat tolerance is low
Patent US PP16,989 P3 dated August 13, 2006
Current status - obsolete or rarely used
Recommended replacement - Prime-Ark Freedom
Country of origin - United States
Agawam Amanda Anastasia Wyeberry Apache Arapaho Babycakes Bailey Big Daddy Black Butte Black Diamond Black Gem Black Jack Black Magic Black Pearl Black Satin Blakely Boysenberry Brazos Caddo Chesapeake Chester Thornless Cheyenne Chickasaw Chief Joseph Choctaw Clark Gold Columbia Giant Columbia Star Columbia Sunrise COX's miracle berry Danna Douglass Doyle's Thornless Eclipse Evergreen Thornless Galaxy Hall’s Beauty Heaven Can Wait Hedrick HJ-6 HJ-7 Hull Thornless Illiny Hardy Kelly Kiowa Kotata Loganberry Lucretia Marion Mary Carmen Metolius MM01 Natchez Navaho Nettleton Creamy White Newberry Nightfall Obsidian Onyx Osage Ouachita Ponca Prime-Ark 45 Prime-Ark Freedom Prime-Ark Horizon Prime-Ark Traveler Prime-Jan Prime-Jim Reuben Schultz Shawnee Siskiyou Smoothstem Sweetie Pie Thornfree Triple Crown Twilight Von Waldo Wild Treasure Willamette Thornless Marion
Canes of Prime-Jim are thorny and erect, vigorous. If primocanes are tipped at 1 to 1.3 m to control length and encourage lateral branching, Prime-Jim can be grown in a hedgerow without trellis support. However, support of canes during fruiting is recommended.
Average yield on floricanes is about 13 t/ha, on primocanes - about 3 t/ha.
Average berry weight on floricanes and primocanes is about 5 g. Berries of Prime-Jim are blocky, conical, black with glossy finish. Fruit shape varies on primocanes and quality factors including glossiness and color are affected by heat. Also observed doubled fruits.
Floricane bloom date is the end of April or beginning of May, primocane bloom date is the middle of June. Floricane harvest date is the second week of June, primocane first ripe fruit date is the third week of July. Flowering continues until first frosts.
High air temperature can cause profound reductions in flowering.
This variety requires winter shelter, winter hardiness is about minus 13 C.