- Name: Trailing Blackberry - Other Common Names: California Blackberry / California Dewberry / Douglas Berry / Pacific Blackberry / Pacific Dewberry - Scientific Name: Rubus Ursinus - Color: White Flowers / Dark Purple - Black Berries - Plant Seeds: Fall Sow Seeds Or Cold Stratify - Bloom Time: Flowers In Spring - Harvest: Harvest Fruit Summer - Fall - Hardiness Zone: 3 - 8 - Plant Height: 24 - 60" - Plant Spacing: 72" - Light Requirements: Sun - Soil Water Preferences: Average - Quantity: 25 Seeds - Other: The Trailing Blackberry Is Native To Western North America. It Is A Vining Shrub With Evergreen Leaves, Fragrant Flowers, Delicious Edible Fruit. The Blackberry Fruit Is Aromatic Sweet, Grows To Almost An Inch Long. You Can Enjoy The Juicy Berries Fresh, Dried, Or Added To An Endless List Of Deserts Or Dishes. This Particular Variety Of Blackberry Is So Delicious, It Was Chosen As The Parent Plant Of Both The Loganberry Boysenberry. The Trailing Blackberry Plant Is Also Valuable To Many Types Of Wildlife. It Is A Host Plant For Swallowtail Mourning Cloak Butterflies. It Provides Pollen Nesting Material For Bees, Birds Other Small Animals Nest In The Branches. The Berries Are Loved By Birds All Kinds Of Woodland Animals Like Squirrels Chipmunks.