Trailing Blackberry Western Blackberry California Blackberry Dewberry

Trailing blackberry (Rubus ursinus), also called western blackberry, California blackberry, or dewberry, is a broadleaf shrub in the Rosaceae family native to western North America from British Columbia to California, east to Idaho, south to Mexico. It reaches 10-20 ft in length with a trailing habit, forming sprawling thickets in waste places, fields, and canyons below 1,000 meters.

Trailing blackberry is hardy in zones 3a-8b and tolerates full sun to shade with moist soil (pH 4.5-8.5) and moderate water. Thirty-two diseases and 4 pests are documented. The fruit has a moderate edibility rating (3/5). This is the parent species of the cultivated marionberry and other trailing blackberry cultivars.