Rubus subgenus Rubus Watson 'Dirksen Thornless'
Plants are thornless
Bushes have semi-erect canes
Fruit weight is 6 g
Berries have a conical shape
Fruiting habit - floricane fruiting (summer-bearing)
Flowering on floricanes starts in the first week of June
Ripening date (regular) - third week of July
Productivity is 8 kg per plant
Cold hardiness is excellent
Heat tolerance is low
Country of origin - United Kingdom
Current status - obsolete or rarely used
Recommended replacement - Caddo
Plants are large and moderately vigorous, canes length achieves up to 5 m in length. Bush has a lot of replacement stems.
Begin to bloom at the end of May or beginning of June. First fruit ripen at the end of July, harvest season ends on the last week of September. Berries of Dirksen Thornless are big (berry weight is 5-7 g), unripen fruit have red color, and only fully ripen berries are black. Their juicy flesh is tart, sweet and sour.
Dirksen Thornless blackberry has great resistance to low air temperatures up to minus 25 C.