Columbia Star Thornless Blackberry
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! Vines are vigorous and trailing and fruits ripen in mid July here in the Willamette Valley. Another added bonus for the Columbia Star is that it is reportedly even more cold hardy than the Marionberry. Fruit is easy to pick by hand or by machine harvesting making it a winner for home gardeners as well as commercial growers.
Latin Name: Rubus hybrid
Site and Soil: Blackberries like 1/2 day to full sun and well-drained soil.
Pollination Requirements: Blackberries are self-fertile.
Hardiness: Columbia Star Blackberries are hardy to at least 5 F.
Bearing Age: 1-2 years after planting.
Size at Maturity: 6 ft. in height on trellis.
Bloom Time: April
Ripening Time: July
Yield: 10-15 lbs.
Pests & Diseases: Blackberries do not suffer from significant pest or disease problems.
USDA Zone: 7
Sunset Western Zone: 2-24
Sunset Northeast Zone: 31, 32, 34-41