RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

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

Frangula (purshiana)

Cathy Sampselle
Nursery Manager
Sound Native Plants
PO Box 7505
Olympia, Washington 98507
360-352-4122
360-867-0007 (fax)
cathy@soundnativeplants.com
soundnativeplants.com

Family Scientific Name: Rhamnaceae
Family Common Name: Buckthorn Family
Scientific Name: Frangula purshiana DC
Common Synonym: Rhamnus purshiana
Common Name: Cascara
Species Code: FRPU7
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 6 Months
Propagule Collection: Collect ripe fruit in July/August in western Washington. Pre-ripe/yellow fruit can also be collected and processed directly.
Propagule Processing: Macerate fruit in water overnight. Further separate pulp from seed using a food processor with either duct-tape wrapped or plastic blades and screens. Store clean, dry seed in the refrigerator.
Pre-Planting Treatments: Cold, wet stratification for 10 weeks beginning in January.
Growing Area Preparation/
Annual Practices for Perennial Crops:
Sow into 10 cubic inch tubes filled with Sunshine Mix #1 in March. Sow 3-5 seeds per tube.
Establishment Phase: Tubes will be fully rooted within 10 weeks. Success rate of tubes: 70%. The tubes can then be potted into 1-gallon containers and will be fully rooted by September. Success rate of 1-gallons: 91%.

Citation:

2007. Propagation protocol for production of Container (plug) Frangula purshiana DC plants Sound Native Plants Olympia, Washington. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/03). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.