The Columbia Star Thornless Blackberry is another exciting new addition to the blackberry world courtesy of the USDA and Oregon State University! Columbia Star has the beloved Marionberry in its lineage and the flavor of these large berries has been rated as good or even better than the Marionberry! It is more cold hardy than the Marionberry. Vines are vigorous and trailing. Zones 6-9. Shipped in their 2 3/8" x 5" pots.