Photo by Melody

PlantFiles: 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)

3 vendors have this plant for sale.

Edible Fruits and Nuts

36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

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


Bloom Color:
Unknown - Tell us

Bloom Time:
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer

Good Fall Color

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Suitable for growing in containers

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


1 positive
No neutrals
1 negative

Gardeners' Notes:

Negative JeffAW 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 diamondjfarms 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.


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

Macminnville, Oregon
Allen, Texas

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