Osage blackberry variety

Rating [ 4.8 ]

Erect-growing, high-quality, early-ripening productive floricane-fruiting blackberry cultivar with long fruiting period

Botanical designation

Rubus subgenus Rubus Watson 'Osage'

Originated from a cross of

Originated from a cross of A-1719T x A-2108T

Variety denomination

Variety denomination - 'Osage', tested as A-2362

Plants are

Plants are thornless

Bushes have

Bushes have erect canes

Fruit weight is

Fruit weight is 5 g


Berries have a rounded shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Begins to bloom in the

Begins to bloom in the fourth week of April

Harvest season starts in the

Harvest season starts in the second week of June

Productivity is

Productivity is 3 kg per plant

Soluble solids

Soluble solids - 10.3%


Acidity - 0.46%

Cold hardiness is

Cold hardiness is moderate

Heat tolerance is

Heat tolerance is moderate

Country of origin

Country of origin - United States


Patent US PP26,120 P3 dated November 22, 2015

Current status

Current status - cultivated (actual)

Osage is the thirteenth release in a series of erect-growing, high-quality, productive floricane-fruiting blackberry cultivars developed by the University of Arkansas Division of Agriculture. An enhanced effort in the improvement of flavor in blackberries has been underway in the Arkansas program for a number of years, and Osage was developed with the intention of advancing flavor to a higher level in a thornless blackberry cultivar. Osage ripens mid-early, slightly before Ouachita and just after Natchez. Osage produces medium-sized berries, smaller than that of Natchez but comparable to that of Ouachita. Osage has excellent postharvest quality for the shipping market in addition to local market use. Canes of Osage are thornless and erect, up to 1.5 m in height. Vigor rating is good and slightly higher than Natchez, Ouachita and Prime-Ark 45. The beginning of bloom is the end of April. First harvest date is the beginning of June. Average berry weight is about 5 g. Average yield is 3 kg per plant. Fruits of blackberry cultivar Osage are round and similar in shape to Ouachita. Berries of Osage are glossy with a uniform black finish. Winter-hardiness can be one of the more important characteristics of successful blackberry cultivars, particularly in colder climates or in severe winters.
Overall, Osage appears similar in hardiness to most of the other Arkansas developed cultivars such as Ouachita and Navaho (minus 13 C). Blackberry Osage is expected to perform well in areas where Apache, Arapaho, Ouachita, Natchez or Navaho is adapted.
Table 1. Сomparison table of Osage, Ouachita, Natchez and Apache blackberries at the University of Arkansas Fruit Research Station, Clarksville for a 3-years replicated trials
Main features Variety
Osage Apache Natchez Ouachita
Flowering date
10% bloom April 26 May 3 April 20 April 30
50% bloom May 2 May 8 April 29 May 6
Harvest date
First June 10 June 18 June 5 June 13
Peak June 26 July 6 June 17 June 29
Last July 24 August 9 July 15 July 27
Berry weight, 1 pcs
First 4.6 7.5 7.7 5.1
Peak 5.6 8.2 7.9 5.8
Last 4.0 6.8 7.2 4.0

How to cultivate blackberry

How to cultivate blackberry Osage?

1. Include annual preemergence and postemergence herbicide applications;
2. Include annual spring nitrogen fertilization (about 56 kg/ha) using ammonium nitrate NH4NO3;
3. Summer tipping of primocanes at 1.1 m;
4. Sprinkler irrigation apply as needed;
5. Use dormant pruning;
6. A single application of liquid lime sulfur (94 L/ha) each spring at budbreak for control of anthracnose;
7. A single application of liquid ferrous sulphate each fall after the plants have gone into chill;
8. Plant spacing at least 0.6 m.
Diseases resistance

What diseases is blackberry Osage resistant to?

Osage has very good resistance to diseases such as AnthracnoseCrown GallVerticillium Wilt
Diseases susceptibility

What diseases is blackberry variety Osage vulnerable to?

Osage is quite prone to diseases such as Grey MoldFire blight
Useful Growing Guides

Useful Growing Guides:

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Reviews of the variety Osage


Osage BlackBerry bush, first fruit of the season.


EMCO CAL - Osage Blackberry Variety


Review from [JTBURTON-GW]

I ordered two Osage Blackberry plants last year, around late July, as tissue culture plugs and finally planted them in the ground in late August. Going into last winter I had about 1ft of cane growth on each. The young plants were covered with pine straw and made it through the cold winter uninjured. This year their growth has been vigorous, more so than the Ouachita of which that they are often compared. I pruned the plants to maintain a 4ft height, so they expanded outwards in response to the pruning, so they are quite wide (about 5-6ft). My Ouachita, which are allowed to grow to 5ft unpruned, tend to not be wider than 3ft in diameter and make a nice hedge.
From that 1 ft cane, I had several 3ft long fruiting laterals grow out and 20-30 berries to sample. Fruit size is smaller than Ouachita, in the 6-8 gram range; the berries tend to be round or at least rounder than Ouachita. The flavor is sweeter, when ripe, than Ouachita but not as full flavored as Triple Crown. You do have to wait a day or two from the black color stage for the sweetness whereas Triple Crown can be tolerable to eat just as it turns black. Ouachita always requires several days after turning black to arrive at mild sweetness. I would recommend it as a thornless blackberry option but make sure you give it at least 3ft between plants.
I'm including a picture of some of its fruit late in the year (Sept.)

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