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The Forest Service National Center for Reforestation, Nurseries, and Genetic Resources (RNGR) is a leading source of technical information for nurseries and land managers regarding production and planting of trees and other native plants for reforestation, restoration, and conservation.

 
NPN Protocol Details Image

Rubus (ursinus)

Betty Young
Nurseries Sr Manager
Bldg 201, Fort Mason
San Francisco, California 94123
415-331-6917
415-331-7521 (fax)
byoung@ggnpa.org

Family Scientific Name: Rosaceae
Family Common Name: Rose Family
Scientific Name: Rubus ursinus Cham. & Schlecht.
Common Name: California Blackberry
Species Code: RUBURS
Ecotype: Tennessee Valley, California
General Distribution: R. ursinus is found from Oregon to Lower California, in waste places, fields, and canyons, below 3,000 feet elevation.
Propagation Goal: plants
Propagation Method: vegetative
ProductType: Container (plug)
Stock Type: Deepot 40
Time To Grow: 0
Target Specifications: Height: N/A<br> Caliper: N/A<br> Root System: Firm plug in container.
Propagule Collection: Hardwood cuttings are collected between and Decmber 15th and January 31st.
Cutting diameter is 1/8 inch.
Cutting length is 15 inches including at least 15 nodes.
Propagule Processing: Cuttings are kept moist and cool prior to treatment.
Pre-Planting Treatments: Cuttings are dipped in a mild bleach solution for 30 seconds.
Cuttings are re cut to 5 inch lengths of 4 nodes each.
Cuttings are treated with Hormex (3000 ppm IBA) rooting powder and struck in flats containing 3:1 perlite/vermiculite.
100 Cuttings are struck 3 inches deep per flat.

% Rooting: 70%
Growing Area Preparation/
Annual Practices for Perennial Crops:
Fully Controlled Greenhouse.
Flats are kept in the greenhouse and watered with an automatic mist system until roots are fully developed. Flats are placed on a heated bench.
Establishment Phase: Planting Method: Transplanting Cuttings.

Time to Transplant:70 days.
Cuttings are transplanted to individual containers 2"x10" tubes (Deepot 40) containing standard potting mix of peat moss, fir bark, perlite, and sand. Cuttings are placed in the shadehouse.
Transplant Survival averages 70%.
References: A California Flora and Supplement, Munz, P., University of California Press, Berkeley and London, 1973.

Citation:

Young, Betty. 2001. Propagation protocol for production of Container (plug) Rubus ursinus Cham. & Schlecht. plants Deepot 40; San Francisco, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/01). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.