Columbia Star Thornless Blackberry
Rubus subg. Rubus Watson 'Columbia Star'
Columbia Star, released in 2014, is a vigorous, thornless, trailing blackberry. It has superior flavor, large firm berries and is very consistently productive. The flavor is rated as good or better than Marionberry, which is 20% of Columbia Star's parentage. It ripens early mid-season; mid-July in Oregon's Willamette Valley.
It is somewhat hardier than a Marionberry; hardy to below 10 F. Its shorter canes end at 6 feet, and coupled with its thornless structure, it's particularly easy to manage in the home landscape. Developed by Oregon State University with the USDA. Patent #25,300. USDA zones 7-9.