HJ-6 blackberry variety

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Early-ripening variety which primarily adapted to the climate and growing conditions of the California

Originated from a cross of

Originated from a cross of Obsidian x Eaton

Plants are

Plants are thorny

Bushes have

Bushes have trailing canes

Fruit weight is

Fruit weight is 8 g


Berries have a oblong shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Flowering on floricanes starts in the

Flowering on floricanes starts in the third week of March

Ripening date (regular) -

Ripening date (regular) - first week of June

Productivity is

Productivity is 7000 kg from ha

Soluble solids

Soluble solids - 9.2%

Cold hardiness is

Cold hardiness is low

Country of origin

Country of origin - United States


Patent US PP23,270 P3 dated December 25, 2012

Current status

Current status - obsolete or rarely used

HJ-6 blackberry is a result of a controlled cross made in 2005 between the Obsidian (female plant) and Eaton (male). HJ-6 is primarily adapted to the climate and growing conditions of the California. HJ-6 has reacted favorably to the coastal climates of northern coastal California, but for maximum fruit production, variety requires consistent soil moisture and adequate nutrition. Best results were received with HJ-6 in tunnels.
The following traits have been observed and are determined to be the main characteristics of HJ-6:
  1. Consistent production of good quality fruit, regardless of the time of year and the age of the plant;
  2. Large fruit size;
  3. Thorny and trailing stems;
  4. Fruit production is starting in early June with peak production in late June, continued limited production through July and August.
When the blackberry variety HJ-6 is compared to the female parental variety Obsidian, the following trait differences have been observed:
  1. The peak fruit production of HJ-6 occurs later than Obsidian;
  2. In holding testing after picking, the average flavor rating was the same, but HJ-6 rated higher in appearance than Obsidian after various days in cold storage;
  3. HJ-6 has produced more commercial quality fruit than Obsidian, and a smaller percentage of non-commercial quality fruit per ha.
The fruit of this cultivar is produced on dark red strong canes. Typical plant's height is from 120 to 150 cm. Prickles are red to green in color. Leaves are green, have 3 or 5 medium-reliefed leaflets. Plants bloom very early in California - from mid-March to April. Flowers are white in color, have 5 sepals. Berries are large, up to 12 g each (averaged 8 g), oblong to conic in shape. Size of seeds is large, from 3 to 4 mm. Taste is sweet-acidic.
HJ-6 variety is susceptible to spider mite. Winter hardiness is very low.

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