Onyx blackberry variety

Rating [ 4 ]

Trailing thorny blackberry cultivar with nice-looking fruit

Botanical designation

Rubus subgenus Rubus 'Onyx'

Originated from a cross of

Originated from a cross of OSC 1466 x ORUS 1177-11

Variety denomination

Variety denomination - 'Onyx', tested as ORUS 1523-4

Plants are

Plants are thorny

Bushes have

Bushes have trailing canes

Fruit weight is

Fruit weight is 6 g


Berries have a conical shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Begins to bloom in the

Begins to bloom in the first week of June

Harvest season starts in the

Harvest season starts in the second week of July

Productivity is

Productivity is 14 kg per plant

Soluble solids

Soluble solids - 13.7%


Acidity - 0.96%

Cold hardiness is

Cold hardiness is moderate

Heat tolerance is

Heat tolerance is moderate

Country of origin

Country of origin - United States


Patent US PP22,358 P2 dated December 18, 2011

Current status

Current status - cultivated (actual)

Onyx is a trailing blackberry variety from the US Department of Agriculture - Agricultural Research Service breeding program.
Onyx is a vigorous, prickly, trailing blackberry that produces good yields of uniform, firm, and sweet high-quality berries with excellent flavor, that are suited for the local and fresh market. The combination of Onyx’s berries size, shape, and firmness makes them well suited for packing in clamshells for the wholesale fresh market.
Onyx variety is later ripening (middle of July) and has medium large berries. Berries are conic with compact uniform drupelets. Onyx berries are bright glossy black. The fruit flavor was rated as excellent. The fruit is medium large, average berry's weight is about 6 g. Onyx cultivar maintains a uniform fruit size throughout the harvest season. Typical cane length is approximately 4 m, canes emerge radially from the plant crown and trail on the soil surface if not trained to a trellis as would be typical. Onyx plants are vigorous, with moderate suckering from crowns, canes are predominantly trailing. Productivity is high, ranged from 12 to 16 kg plant over three weeks (5-95% harvest). The length of the harvest season is about three weeks.
Onyx is not winter-hardy, max to minus 13 C. Canes don't like wind, especially cold winter's wind with frosting. Onyx needs to be covered. We strongly recommend to cut primocanes to 0.5 m and use high-density agrotechnical material for covering.
Table 1. Yield and berry weight comparison table
Cultivar Berry weight, g Yield, kg/ha
2004 2005 2006
Onyx 6.1 16849 12432 13645
Siskiyou 6.7 11441 12453 6195
Marion 5.2 19527 14967 8851
Table 2. Comparison table of soluble-solid content, titratable acidity and pH parameters of blackberry cultivars (Onyx, Black Diamond, Loch Tay, Marion etc.)
Cultivar Parameter
Soluble solids, % Acidity, % pH
Onyx 12.7 1.1 3.5
Black Diamond 10.1 1.2 3.5
Black Pearl 13.4 1.6 3.3
Evergreen Thornless 15.5 1.2 3.4
Loch Tay 10.7 0.97 3.5
Marion 13.7 1.7 3.3
Navaho 13.9 1.2 3.4
Nightfall 13.8 3.0 3.1
Obsidian 12.4 1.7 3.3
Siskiyou 12.9 1.6 3.3
Waldo 13.5 1.7 3.4

How to cultivate blackberry

How to cultivate blackberry Onyx?

A standard cultural practices for creeping blackberry production:
1. Annual pre- and post-emergent herbicide applications;
2. Spring nitrogen fertilization (78 kg N/ha);
3. Post-harvest removal of floricanes;
4. Training of primocanes to a two-wire trellis;
5. Weekly overhead application of 2.5 to 5.0 cm of irrigation during the growing season depending on rainfall;
6. Dormant applications of liquid lime sulfur and copper hydroxide were made to control leaf and cane spot, purple blotch, orange rust and anthracnose;
7. Timely applications of pesticides during the season;
8. One-time application of ferrous sulphate in late fall.
Diseases resistance

What diseases is blackberry Onyx resistant to?

Diseases susceptibility

What diseases is blackberry variety Onyx vulnerable to?

No susceptibility to spicific pests or diseases has been observed for Onyx
Useful Growing Guides

Useful Growing Guides:

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