California Blackberry (Ursinus)

The California Blackberry (Ursinus) is generally described as a perennial subshrub. This is native to the U.S. (United States) has its most active growth period in the spring and summer . The California Blackberry (Ursinus) has green foliage and inconspicuous white flowers, with a moderate amount of conspicuous black fruits or seeds. The greatest bloom is usually observed in the early spring, with fruit and seed production starting in the spring and continuing until summer. Leaves are not retained year to year. The California Blackberry (Ursinus) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical California Blackberry (Ursinus) will reach up to 2 feet high, with a maximum height at 20 years of 2 feet.

The California Blackberry (Ursinus) is usually not commercially available except under contract. It can be propagated by bare root, container, seed, sprigs. It has a slow ability to spread through seed production and the seedlings have low vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below 7°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Rapid
General Type Subshrub
Growth Period Spring, Summer
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability Contracting Only
Physical Characteristics
Bloom Period Early Spring
Displays Fall Colors No
Shape/Growth Form Thicket Forming
Drought Tolerance Medium
Shade Tolerance Intolerant
Height When Mature 2
Vegetative Spread Moderate
Flower Color White
Flower Conspicuousness Yes
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Spring Summer
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Seed, Sprigs
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature 7
Soil Depth for Roots 14
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability Yes
Responds to Coppicing No
Growth Requirements
pH Range 6–7.5 pH
Precipitation Range 14–14 inches/yr
Planting Density 1200–2700 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 14
Minimum Frost-Free Days 190 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability High
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA