Polar blackberry variety

Rating [ 4.4 ]

Thornless erect-growing floricane-fruiting cultivar with giant berries and superb winter hardiness

Botanical designation

Rubus subgenus Rubus fruticosus 'Polar'

Variety denomination

Variety denomination - 'Polar'

Plants are

Plants are thornless

Bushes have

Bushes have erect canes

Fruit weight is

Fruit weight is 10 g


Berries have a oblong shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Ripening date (regular) -

Ripening date (regular) - fourth week of July

Productivity is

Productivity is 6 kg per plant

Cold hardiness is

Cold hardiness is extremely high

Heat tolerance is

Heat tolerance is low

Country of origin

Country of origin - Poland

Current status

Current status - cultivated (actual)

Blackberry variety Polar is thornless erect floricane-fruiting plant from Experimental Station Of The Institute Of Horticulture, Brzezna, Poland.
Polar is very vigorous plant, has from 2 to 10 root stems. Stems are thick and strong, up to 3 m in length. New canes are bright green in color, but soon become hardwood. Strongly recommended to lay the canes on the trellis timely for prevent canes damage. Laterals usually are short.
Flowers are big, have white color with pink shade. Fruits of Polar are large in size, saturated glossy black in color and have oval shape. First ripen berries appear at the end of July. Average berry weight is about 10 g. Some berries achieves 20 g in weight. Yield is medium, about 6 kg from plant. Fruit quality is good, transportability is high. Taste and flavor is little similar to Triple Crown. Firmness is moderate, transportability is low.
Polar has very good winter hardiness up to minus 30 C. In south region there is no necessity to use winter shelters. But it is recommended to use light covers like nonwoven materials.

Diseases resistance

What diseases is blackberry Polar resistant to?

Polar has very good resistance to diseases such as Orange RustRosette or Double-Blossom
Diseases susceptibility

What diseases is blackberry variety Polar vulnerable to?

Polar is quite prone to diseases such as Grey MoldSpur Blight or Purple Blotch (Didymella Applanata)
Useful Growing Guides

Useful Growing Guides:

Plablack 1401
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