Hull Thornless blackberry variety

Rating [ 5 ]

High-yielding aromatic blackberry variety with sour fruit for commercial cultivation and home gardening

Botanical designation

Rubus subgenus Rubus Watson 'Hull Thornless'

Originated from a cross of

Originated from a cross of Thornfree x Darrow

Variety denomination

Variety denomination - 'Hull Thornless'

Hull Thornless is the parent for

Hull Thornless is the parent for Shuofeng, Mizao

Plants are

Plants are thornless

Bushes have

Bushes have semi-erect canes

Fruit weight is

Fruit weight is 7 g


Berries have a conical shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Flowering on floricanes starts in the

Flowering on floricanes starts in the second week of June

Ripening date (regular) -

Ripening date (regular) - fourth week of July

Productivity is

Productivity is 40 kg per plant

Cold hardiness is

Cold hardiness is excellent

Heat tolerance is

Heat tolerance is low

Country of origin

Country of origin - United States

Current status

Current status - obsolete or rarely used

Recommended replacement

Recommended replacement - Ouachita

Hull Thornless is high-yielding aromatic blackberry variety for commercial cultivation and home gardening, has Thornfree and Darrow cultivars in parents. Selected by Illinois Southern Illinois University, distributed since 1981.
Bushes are medium-strong, have semi-erect, long (3-5 m) spineless stems. Height is low to medium (1-1.5 m), plants have numerous side shoots, due to this feature plant seems very spreading.
Hull Thornless starts to bloom in early June, flower's color is white with purple tint. First berries mature at the end of July, harvest period is very long, more than 30 days. Yield is high and stable, up to 45 kg from plant. Fruit are large, have elliptical form, black color with glossy, large-sized drupelets. Single fruits can be very large up to 12-14 g. Firmness is enough for transport. Taste is sour, ripe berries are very aromatic.
Hull Thornless is very low susceptibility to rot diseases, medium-high susceptible to blackberry gall mite. Winter hardiness is excellent, up to minus 23 C.

Diseases resistance

What diseases is blackberry Hull Thornless resistant to?

Hull Thornless is resistant to most fungal diseases
Diseases susceptibility

What diseases is blackberry variety Hull Thornless vulnerable to?

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

Useful Growing Guides:

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