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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

Collomia (grandiflora)

Amy Bartow
Seed and Plant Production Manager
USDA NRCS - Corvallis Plant Materials Center
3415 NE Granger Ave
Corvallis, Oregon 97330
(541) 757-4812 ext 103
(541) 757-4733 (fax)
amy.bartow@or.usda.gov
http://plant-materials.nrcs.usda.gov/orpmc
Family Scientific Name: Polemoniaceae
Family Common Name: Phlox family
Scientific Name: Collomia grandiflora Lindley Ann
Common Name: grand collomia
Species Code: COGR4
Ecotype: Seeds were collected in Lane Co. near Eugene.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Propagule Collection: Entire plants were cut off at the base when top seeds shatter. Plants were placed in a screen-covered container and left to dry.
Propagule Processing: Seeds were cleaned using an air-screen machine.
Pre-Planting Treatments: Seeds were sown into cone-tainers filled with Sunshine #1 (a soil-less peat-based media) amended with micro-nutrients (Micromax) and a slow release fertilizer (Osmocote 14-14-14). The flats of cone-tainers were covered with poly-ethylene bags and placed in a walk-in cooler (35-40 degrees) for 4 weeks
Growing Area Preparation/
Annual Practices for Perennial Crops:		 Flats were removed from the cooler after 4 weeks and placed in a greenhouse set at moderate temperatures (70 degrees days/50 degrees nights).
Other Comments: One flat of cone-tainers sown with seeds ("control flat") was placed in the greenhouse without any cold-moist stratification. No seeds germinated. Flats placed in cooler for 45 days had 95% germination. A two-week cold period may be sufficient to break dormancy, fresh seed will also germinate in the fall.

Citation:

Bartow, Amy L. 2003. Propagation protocol for production of Container (plug) Collomia grandiflora Lindley Ann plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. 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.