Reuben blackberry variety

Reuben is a late-season primocane blackberry bred at the University of Arkansas, USA, using specific targeted breeding, and selected in the UK for growing in UK and Northern Europe.
Rueben was introduced to broaden the choices of this innovative, prickly primocane-fruiting blackberry cultivar. This unique type of blackberry Reuben fruits on current-season canes (primocanes) and probably on second-season canes (floricanes), potentially providing for two cropping seasons, both traditional summer fruits in addition to late summer to fall production. Traditional blackberry cultivars fruit on floricanes, requiring canes to be overwintered to produce a crop.
This fruiting habit has the potential to expand blackberry production much like that which has occurred for primocane-fruiting red raspberries.
The average primocanes length is about 2 m. Primocanes are strong and vigorous, have prickles like Kiowa. Reuben bushes don't like full-sun placement. High temperature and low humidity prevents Reuben's blooming and ripening.
Reuben berries are large size, average weight of berry is about 14 g. Color is glossy black. Each plant produces groups of berries, 8-10 pcs in each. The first yield starts forming at primocanes in the middle of June and continues three to four weeks. During this first harvest season, Reuben intensively produces floricanes, which soon begin to bloom. This is the second harvest season, which continues up to first frosts. After the end of the second harvest season, Reuben requires winter shelter from frost or completely cropping for current-season stems, freezing and cold wind, because the cold-hardy of this blackberry variety is moderate, about minus 13 C.