HJ-7 blackberry variety
Second ultra early-ripening blackberry cultivar, which made for northern coastal California and based on Obsidian variety
Rubus subgenus Rubus Watson 'HJ-7'
Originated from a cross of Obsidian x Eaton
Variety denomination - 'HJ-7'
Plants are thorny
Bushes have trailing canes
Fruit weight is 6 g
Berries have a oblong shape
Fruiting habit - floricane fruiting (summer-bearing)
Flowering on floricanes starts in the third week of March
Ripening date (regular) - fourth week of May
Productivity is 3500 kg from ha
Soluble solids - 12%
Cold hardiness is low
Heat tolerance is low
Country of origin - United States
Patent US PP24.298 P3 dated March 10, 2014
Current status - obsolete or rarely used
Recommended replacement - Columbia Sunrise
When the HJ-7 is compared to the HJ-6, the following trait differences have been observed:
- The fruit production of HJ-6 occurs later in the season than HJ-7;
- The overall (total season) production of HJ-6 is greater than that of HJ-7;
- The average berry size of HJ-6 (8-10g) is larger than the average berry size of HJ-7 (6-7 g);
- The leaf color of HJ-6 is lighter in early June than the leaf color of HJ-7 at the same point in the season;
- HJ-6 is considered superior to HJ-7 in side-by-side flavor test results.
Is blackberry HJ-7 sweet?
Useful Growing Guides:
Berry Soil and Nutrient Management – A Guide for Educators and Growers. M. Pritts, C. Heidenreich, L. McDermott, and J. Miller; Cornell University, Ithaca, NY
High Tunnel Raspberries and Blackberries. AJ Both, Kathy Demchak, Eric Hanson, Cathy Heidenreich, Greg Loeb, Laura McDermott, Marvin Pritts, and Courtney Weber; Cornell Cooperative Extension
Raspberry and Blackberry Production Guide. L. Bushway, M. Pritts, D. Handley; Natural Resource, Agriculture, and Engineering Service Cooperative Extension, Ithaca