Primocane-Fruiting Blackberry
Rubus 'Prime-Jim'

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rubus (ROO-bus) (Info)
Cultivar: Prime-Jim
Additional cultivar information:(aka APF-12)

Category:

Edible Fruits and Nuts

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Suitable for growing in containers

Height:

36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)

Spacing:

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)

Hardiness:

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Danger:

N/A

Bloom Color:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Mid Spring

Late Spring/Early Summer

Foliage:

Deciduous

Good Fall Color

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From hardwood cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

From seed; sow indoors before last frost

By simple layering

By tip layering

By serpentine layering

By stooling or mound layering

Seed Collecting:

Remove fleshy coating on seeds before storing

Allow unblemished fruit to ripen; clean and dry seeds

Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds

Ferment seeds before storing

Properly cleaned, seed can be successfully stored

Regional

This plant has been said to grow in the following regions:

Macminnville, Oregon

Allen, Texas

Gardeners' Notes:

1
positive
0
neutrals
1
negative
RatingContent
Negative

On Oct 22, 2011, JeffAW from Mcminnville, OR wrote:

This variety does produce on first-year canes and the berries are of a decent quality. That said, there is a minor and major negative point to this berry. The berries are very late to ripen and for myself in the Willamette Valley of Oregon that means I can start picking them well after Labor Day. A nice idea to extend the harvest but as the amount of daylight decreases the berries cannot reach their full potential. The biggest drawback I have found is the aggressive root system. I have never seen this in any other type of Rubus species. Maybe in a more well-contained environment with warmer autumn temperatures Prime-Jim would find its perfect home.

Positive

On Jan 9, 2010, diamondjfarms from Needville, TX (Zone 9a) wrote:

Finally, a primocane blackberry. This means they will make fruit on their first year canes, and I can mow them down at the end of the season along with my Heritage red raspberries. They should both sprout in the spring and be ready for harvest in the fall. I just bought them, and will let ya'll know how they do here in zone 9b.