Prime Ark 45 is a new “Primocane” fruiting blackberry for temperature sensitive areas. Prime Ark 45 will grow a cane and produce fruit during the same growing season (similar to everbearing raspberries). Prime Ark 45 will allow the berries to be grown anywhere the summer is long enough to grow the cane and ripen the fruit. There is still much to be learned as to the proper culture in growing this type of blackberry. Prime Ark 45 has the ability to produce two crops in traditional blackberry growing areas. One crop in the fall from the primocanes (new cane growth) and a summer crop the following year from the floral canes (over-wintered canes). Zones 4-8.