Hall’s Beauty blackberry variety

Blackberry cultivar Hall’s Beauty was introduced as a thornless trailing machine harvestable, high-quality blackberry that has extremely large, attractive, and ornamental double flowers, which have many more petals than typical blackberries and that produce large, well-formed berries for the fresh or the processed fruit market.
Hall’s Beauty shares two grandparents with Columbia Star and Columbia Giant and all four grandparents with Columbia Sunrise. Blackberry Hall’s Beauty thornlessness is derived originally from Lincoln Logan, and therefore the canes are entirely thornless. The primocanes of Hall’s Beauty cultivar are as vigorous as those of Marion and Columbia Star, but are less vigorous than for Chester Thornless and more vigorous than those of Black Diamond.
The average fruit weight for a season is about 6 g. Average yield is about 6 kg/plant. The harvest season is similar to Columbia cultivars family, from the middle of June to the middle of July. Hall’s Beauty fruit flavor is excellent, but the acid–sweet balance is tipped toward sweet, which is often more desirable for fresh market consumers but less so for processing. Fruit color is comparable to the other thornless trailing cultivars; it is not as dark as Chester Thornless but blacker/less purple than Marion. Fresh fruit of Hall’s Beauty are rated as having better firmness than Marion and Black Diamond and being as firm as Columbia Star. 
This variety is rated excellent for heat tolerance because it had fewer heat and ultraviolet light injury symptoms than Black Diamond, Chester Thornless or Marion.

Table 1. Yield and average berry weight of Hall's Beauty cultivar at Oregon State University’s North Willamette Research and Extension Center (planted in 2009)

Cultivar	Berry weight, g	Yield, kg/plant
		2011	2012	2013
Hall's Beauty	6.5	4.68	3.59	6.07
Black Diamond	6.0	7.02	2.09	3.17
Columbia Star	7.6	7.48	5.92	8.18
Marion	5.5	6.44	4.75	4.92

Table 2. Yield and average berry weight of Hall's Beauty cultivar at Oregon State University’s North Willamette Research and Extension Center (planted in 2014)

Cultivar	Berry weight, g	Yield, kg/plant
		2016	2017
Hall's Beauty	6.9	7.40	6.21
Black Diamond	6.6	6.73	6.32
Columbia Star	6.9	7.24	6.92
Marion	5.7	4.50	4.72

Table 3. Subjectively evaluated fruit quality traits for Hall's Beauty and some other blackberries (avg. for 2011 - 2013 and 2016 - 2017 years, scale from 1 to 9, where 9 is the best expression)

Cultivar / trait	Hall's Beauty	Black Diamond	Marion	Columbia Star
Drupelet fertility	7.6	7.0	5.9	8.6
Firmness	8.0	6.7	4.6	7.9
Color	8.3	8.0	7.4	8.2
Shape	7.2	7.3	5.3	8.5
Texture	7.8	6.7	8.1	8.1
Flavor	7.6	6.3	8.3	8.2
Glosiness	8.3	7.5	7.3	7.1
Toughness	8.0	6.6	4.5	8.1
Heat damage	7.8	6.3	6.9	8.4

Table 4. Harvest season (avg. for 2011 - 2013 and 2016 - 2017 year)

Cultivar	Ripening
	First (5%)	Peak (50%)	Last (95%)
2011 - 2013
Hall's Beauty	July 3	July 10	July 24
Columbia Star	July 3	July 12	July 24
Columbia Giant	July 3	July 15	July 19
Marion	July 8	July 15	July 24
Black Diamond	July 3	July 17	July 26
Chester Thornless	Aug. 5	Aug. 28	Sept. 25
2016 - 2017
Hall's Beauty	June 24	June 28	July 12
Columbia Star	June 18	July 1	July 8
Triple Crown	July 18	Aug. 5	Aug. 26
Marion	June 24	July 1	July 15
Black Diamond	June 18	July 4	July 15
Chester Thornless	July 22	Aug. 8	Aug. 26

Table 5. Soluble solids, pH and titratable acidity of fruit for Hall's Beauty and other varieties (2011 - 2013 and 2016 - 2017 years)

Cultivar	Soluble solids, %	Titratable acidity, %	pH
Hall's Beauty	12.84	1.38	3.33
Columbia Star	12.64	1.48	3.26
Columbia Sunrise	13.41	0.76	3.69
Black Diamond	10.2	1.26	3.39
Chester Thornless	11.72	1.04	3.30
Marion	12.43	1.51	3.23