California Blackberry, Pacific Blackberry, Trailing Blackberry Rubus ursinus - Rubus vitifolius ssp. ursinus

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Botanical Name:

Rubus ursinus







Common Name:

California Blackberry, Pacific Blackberry, Trailing Blackberry

Seeds Per Pound:
0.1 lb
Average Viable Seeds/Packet:
Germination Test Type:
Collection Locale:
Crop Year:
Minimum Hardiness Zone:
Harvest hemisphere:
In Stock: 0.1 lb
Items are priced on a curve, you can buy any 'bulk quantity' up to what we have in stock, some examples are:
1 packet (~ 34 seeds)
1 gram (~ 714 seeds)
2 gram (~ 1429 seeds)
5 gram (~ 3571 seeds)
10 gram (~ 7143 seeds)
1 oz (~ 20250 seeds)
Growing Info, follow in order:
Scarification: Soak in hot tap water, let stand in water for 24 hours.
Stratification: cold stratify for 90 days.
Germination: Surface sow, cover lightly with medium or vermiculite.
Other: seedlings need shade for their first year. Best grown in rich humus soil with medium to moist soil conditions in part shade.
Physical Characteristics : A decidious Shrub. It is hardy to zone 7 and is not frost tender. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil.The plant prefers acid, neutral and basic (alkaline) soils..It can grow in semi-shade (light woodland) or no shade.It requires moist soil.
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Rubus ursinus is a species of blackberry or dewberry known by the common names California blackberry and Pacific blackberry . It is native to western North America. This is a wide, spreading shrub or vine-bearing bush with prickly branches. Its white flowers may be distinguished from those of other blackberries by their narrow petals. The sweet, edible fruits are dark purple to black and up to 2 centimeters in length. One theory surmises that this species is an ancestor of the loganberry , and is a parent of the Boysenberry . in coastal Washington, the plants are both male and female, the trailing vines appear to be bi-annual for fruiting. They are vigorous spreaders, and need high amounts of moisture to set large fruit. In coastal areas of Washington state they are called "little wild blackberries" and are a favored fruit for commercial pies at restaurants and bakeries. The fruit freezes well on cookie sheets. Seed size seems to be related to fruit "cell" size, and the smallest(1 cm) fully formed berries are most highly prized. Trailing dewberies are a direct ancestor to "marion berries".
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Usda description:
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